Answer:
18 Skittles and 7 Kit Kats
Linear system of equations in two variables
Step-by-step explanation:
We a linear system of two equations which can be solved simultaneously
Total pieces of candy equation
s + k = 25 [1]
Total cost equation
0.8s + 0.9k = 20.70 [2]
Multiply [1] by 0.80
0.80s + 0.80k = 20 [3]
Subtract [3] from [2]
0.80s + 0.90k = 20.70
[tex]-[/tex]
0.80s + 0.80k = 20
[tex]\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots[/tex]
0.1k = 0.70
k = 0.70/0.10 = 7
In [1]
[tex]s + 7 = 25\\\\s = 25-7\\\\s = 18\\\\[/tex]
Answer: 18 Skittles and 7 Kit Kats
A large community college has professors and lecturers. The total number of faculty members is 228. The school reported that they have 5 professors every 14 lecturers How many of each type of faculty member does the community college employ?
There are 60 professors and 168 lecturers according to the given information.
What is arithmetic?
Arithmetic is an elementary a part of arithmetic that consists of the study of the properties of the normal operations on numbers—addition, subtraction, multiplication, division, involution, and extraction of roots.
Main BODY:
Let X be the number of professors and Y be the number of lecturers. As the total of both is 228:
X + Y = 228
Then, as there are 5 professors for every 14 lecturers:
5 X = 14 Y or X = (14/5) Y
Replacing this last value of X on the first equation:
(14/5) Y + Y = 228
(14/5) Y + (5/5) Y = 228
(19/5) Y = 228
Y = 228 * (5/19)
Y = (228*5)/19
Y = 1140 / 19
Y = 60
Then we can find X:
X = (14/5) Y = (14/5) * 60 = 168
X = 168
Hence thre are 60 professors and 168 lecturers.
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8. A parabola has its focus at (1,2) and its directrix is y = -2. The equation of this parabola could be
1) y = 8(x + 1)²
2)y=1/8(x + 1)²
3)y =8(x-1)²
4)y=1/8(x-1)²
The equation of a parabola is y=1/8 (x-1)². Therefore, option 4 is the correct answer.
What is the parabola?A parabola refers to an equation of a curve, such that a point on the curve is equidistant from a fixed point, and a fixed line. The fixed point is called the focus of the parabola, and the fixed line is called the directrix of the parabola.
Given that, parabola has its focus at (1,2) and its directrix is y= -2.
From graph, vertex is (h, k)=(1, 0) and p=2
Substitute (h, k)=(1,0) and p=2 in (x-h)²=4p(y-k), we get
(x-1)²=4(2)(y-0)
⇒ (x-1)²=8y
⇒ y=1/8 (x-1)²
The equation of a parabola is y=1/8 (x-1)². Therefore, option 4 is the correct answer.
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Scott's Heating and Air
Conditioning
charges $80.00 for a service call and $30.00
for each hour of work. Create a graph to
show the relationship between the number
of hours worked and total cost of the repair
bill.
Cost function is fixed cost added with number of hours times the variable cost.
What is cost ?
The two primary categories of costs that organizations face are fixed and variable costs. While variable costs fluctuate with output, fixed costs do not.
Sometimes, fixed costs are referred to as overhead costs. They are incurred regardless of whether a company produces 100 or 1,000 widgets.
Given that charge for a service call is $80.00 and $30.00 for each hour of work. So fixed cost is 80 and variable cost is 30.
Cost function is fixed cost added with number of hours times the variable cost.
Thus we have the cost function here,
where x is the hours of work.
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An animal shelter has 8 puppies. If the puppies are 32% of the total dog and cat population, how many dogs and cats are in the animal shelter?
Answer:
25
Step-by-step explanation:
32/100=8/x
cross multiply
32x=100(8)
32x=800
/32. /32
x=25
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help meeeeeeeeeee pleaseee
The pressure of 28 inches of mercury occurs about 6 miles from the eye of hurricane.
How to solve function?A function having the formula f(x) = ax' + b is said to be linear.
It appears to be a standard linear equation, except the linear function symbol is f rather than y. (x).
You would be given the value of f(x) and asked to locate x when solving a linear function.
F(x) is the barometric air pressure in inches of mercury.
x is the distance in miles from the eye of a severe hurricane.
It is given pressure 28inches of mercury
Put F(x) equal to 28
F(x) = 0.48ln(x+2) +27
28 = 0.48ln(x+2)+ 27
28-27= 0.48ln(x+2)
1= 0.48ln(x+2)
1/0.48= ㏑(x+2)
25/12= ㏑(x+2)
x+2= e^(25/12)
x+2=8.03119
x=8.03119-2
x= 6.03119
x = 6(round off)
Therefore, for 28 inches of mercury occurs about 6 miles from the eye of hurricane.
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A cone has a radius of 4 cm and a height of 12 cm. What is the volume of the cone, to the nearest whole centimeter?
Volume = 201 cm
Step-by-step explanation:How do I find the volume of a cone?Here is an equation to help you find the volume of a cone:
V=πr²[tex]\frac{h}{3}[/tex]=π·4²·[tex]\frac{12}{3}[/tex] ≈ 201.06193cm³
This equation is what I used to solve your question. The answer is 201.06193, but is says round to the nearest whole number, so the answer is actually 201 cm.
In the equation:
V means Volume
π means Pi (3.14)
r² means radius squared
[tex]\frac{h}{3}[/tex] means height divided by 3
4² means 4 · 4
[tex]\frac{12}3}[/tex] means 12 ÷ 3
I hope my answer helped you! If you need more information or help, comment down below and I will be sure to respond if I am online. Have a wonderful rest of your day!
If the following data were transformed, and points with the coordinates
(x, log(y)) were plotted, what points would be plotted? Round log(y) to three
decimal places.
A. (1.690, 49), (2.535, 343), (3.380, 2401)
B. (49, 1.690), (343, 2.535), (2401, 3.380)
C. (1.690, 2), (2.535, 3), (3.380, 4)
D. (2, 1.690), (3, 2.535), (4, 3.380)
The points that would be plotted are (2, 1.690), (3, 2.535), and (4, 3.380).
What are the coordinates?
Any one of a group of numbers used to describe where a point is on a line, a surface, or in space coordinates of latitude and longitude
Here, we have
If the following data were transformed and points with coordinates (x, log(y)) were plotted then we have to find what points would be plotted.
From the table:
At x = 2 and y = 49 ⇒ (x,log(y)) = ( 2 , log 49 ) = (2, 1.690)
At x = 3 and y = 343 ⇒(x,log(y)) = ( 3 , log 343) = (3, 2.535)
At x = 4 and y = 2401 ⇒(x,log(y)) = ( 4 , log 2401) =(4, 3.380)
Hence, The points that would be plotted are (2, 1.690), (3, 2.535), and (4, 3.380).
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The difference between two same side interior angles of two paralell lines is 35 degrees. Find the measures of the two angles.
Problem Solving Strategy: Write an
Equation
Write an equation for each problem using the variable -n. Then solve and check the equation.
6) Allan has 84 baseball cards. This is 19 fewer cards than Mike. How many baseball cards does Mike have?
7) Jamie can ride her bike 3 times as fast as Michelle can jog. If Jamie rides her bike at a rate of 12 miles per hour, how fast can Michelle jog?
Problem Solving Strategy: Mental Math
Hence, the equation for the question (7) is [tex]n + 19 = 84[/tex] and equation for (8) is [tex]3n = 12[/tex]. It can be solved by linear equation in one variable.
What is a linear equation in one variable?
A linear equation in one variable is written as [tex]ax+b = 0[/tex]. Here, [tex]a[/tex] and [tex]b[/tex] are constants and [tex]x[/tex] is a variable.
(7)
Consider n number of baseball cards does Mike have. Since this is 19 less then the cards Allan have hence, as you add 19 in n then it will give 84.
[tex]n + 19 = 84[/tex]
(8)
Consider the speed of Michelle is n. As, it is 3 times less than the speed of the Jamie hence, it you multiply 3 with n then it will give 12.
[tex]3n = 12[/tex]
Hence, the equation for the question (7) is [tex]n + 19 = 84[/tex] and equation for (8) is [tex]3n = 12[/tex].
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Find two consecutive integers between which the solution to each equation is located. x^2=3
Step-by-step explanation:
Using squares of integers numbers, it is found that the solution of the equation is located between the integers x = 1 and x = 2.
The equation given is:
x^2=3
The solution of the equation given is:
X=√3
The squares of the integers numbers until the square root of 3 are:
1^2=1
2^2=4
Since , the square root of 3, which is the solution to the equation, is located between the integers x = 1 and x = 2.
1. The population of a city increases by 4%, Find the increase in the population after 3 years if the original population is 22,000
Answer: 2640
Steps:
There are different ways you can solve this
METHOD 1
1. Find what 4% of 22,000 is
0.04 × 22,000 = 880
You do this so that you can find out the increase from the original number of people in the city
2. Find out what 3 years of increase is
880 = 1 year's worth of increase
880 × 3 = 3 year's worth of increase
2640 = 3 year's worth of increase
Therefore the population increase is 2640 ( 12% )
METHOD 2
1. Find out what 12% of 22,000 is
4% = 0.04
12% = 3 × 0.04
12% = 0.12
12% of 22,000 = 0.12 × 22000
12% of 22,000 = 2640
Therefore the population increase is 2640 ( 12% )
Part 1: Two custodians are painting the hallway in the school, starting
at opposite ends at 10:00 a.m. By noon, if Jon has painted 1/5 of the
hallway and Dan has painted 25% of the hallway, who has painted the
most?
25
Part 2: What percentage of the job needs to be completed after lunch
Answer: Part 1: Dan, Part 2: 55%
Step-by-step explanation:
1. By noon, Jon has painted 1/5 (or 20%) of the hallway and Dan has painted 25% of the hallway. Therefore, Dan has painted more of the hallway than Jon.
2. In total, the two have painted 45% (20% + 25% = 45%) of the hallway by lunchtime. Therefore, 55% (100% - 45% = 55%) needs to be painted after lunch.
A list of brownies for chocolate brownies given at the right will make 16 brownies. Use the list to decide how much each ingredient needed to make 20 brownies, one cup butter, 6 ounces unsweetened chocolate, 2 cup sugar, 1/2 teaspoon vanilla, four eggs half cup flour.
The ingredients for 4 brownies would be: 1/2 cup butter, 15/4 ounces unsweetened chocolate, 9/8 cup sugar, 3 teaspoons vanilla, 3 eggs, and 3/4 cup flour.
What exactly is a proportion?A percentage is a component of a total amount, and the measures are related by the rule of three.
Keep in mind that in a particular ratio, such as: a/b=c/d a*d=b*c
Create the following ratio for each ingredient:1/8 cup butter, 5/8 ounces of unsweetened chocolate, 1/4 cup sugar, 1/8 teaspoon vanilla, 1/2 egg, and 3/16 cup flour.
Explanation:
Given that the original recipe calls for 16 brownies;
Butter:
(1/8)/16=b/12
(2/3)(12)=16b
8=16b
b=1/2
Chocolate:
5/16=c/12
60=16c
c=60/16
c=15/4
Sugar: (3/2)/16=s/12
(3/2)(12)=16s
18=16s
s=18/16
s=9/8
Vanilla: 2/16=v/12
24=16v
v=3/2
Eggs: 2/16=e/12
e=3/2
Flour:1/16=f/12
f=3/4
As a result, the following would be the components for four brownies,
3/4 cups flour, 1/2 cups butter, 15/4 ounces unsweetened chocolate, 9/8 cups sugar, 3/2 teaspoons vanilla, and 3/2 eggs.
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Use the given conditions to find the values of all six trigonometric functions. (If an answer is undefined, enter UNDEFINED.) sec(x) = − 9/5, tan(x) < 0sin(x)=cos(x)=tan(x)=csc(x)=sec(x)=ot(x)=
The given conditions to find the values of all six trigonometric functions is cos (x) =-5/9, sin (x) = 2 root(14)/9, tan(x)= - 2 root(14)/5 and cot(x)= - 5 (2 root 14), csc(x)= 9 /2root (14).
What is trigonometric functions ?
Simply put, trigonometric functions—also referred to as circular functions—are the functions of a triangle's angle. This means that these trig functions provide the connection between the angles and sides of a triangle.
[tex]$\sec (x)=-\frac{9}{5} < 0$[/tex]and [tex]$\tan (x) < 0$[/tex]
so, x is in the second quadrant.
So, [tex]$\cot (x), \cos (x)$[/tex]are negative and [tex]$\sin (x), \csc (x)$[/tex] are positive.
Hence,
[tex]$$\begin{aligned}\cos (x) & =\frac{1}{\sec (x)}=-\frac{5}{9} \\\sin (x) & =\sqrt{1-\cos ^2(x)}=\sqrt{1-\frac{25}{81}}=\frac{2 \sqrt{14}}{9} \\\tan (x) & =\frac{\sin (x)}{\cos (x)} \\& =-\frac{2 \sqrt{14}}{5} \\\cot (x) & =\frac{1}{\tan (x)}=-\frac{5}{2 \sqrt{14}} \\\csc (x) & =\frac{1}{\sin (x)}=\frac{9}{2 \sqrt{14}}\end{aligned}$$[/tex]
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A recipe recommends cooking a roast between 35 and 45 minutes per pound. Which of the following cooking times for a 10-pound roast follows the recommendation?
Answer:
If one of the answers is 5 hours and 50 minutes, that. If its 7 hours and 30 minutes, that. In between is 6 hours and 40 minutes.
Step-by-step explanation:
Name
Chapter
4
Test B (continued)
8. You deposit $300 in an account that earns simple interest at an annual rate of 5%.
How much money is in the account after 6 years?
Answer:
90
Step-by-step explanation:
To solve, you have to use the formula
I=Prt
I is the dollars of of simple interest earned
P is principal in dollars
R is the annual interest rate (decimal form)
T is the time in years
I=Prt
I =300*0.05*6
I = 90
Answer:
we use bodmas!
Step-by-step explanation:
What is the solution of the inequality −3x−3>12 ?
Answer:
[tex]x < -5[/tex]
Step-by-step explanation:
-3x-3>12
Divide by -3, since you are dividing by a negative, flip the equality sign:
x+1<-4
Subtract 1 from both sides:
x<-5
Hello,
I hope you and your family are doing well!
To solve the inequality −3x−3>12, you can start by moving everything to one side of the inequality by adding 3 to both sides. This gives you −3x>15.
Next, you can divide both sides of the inequality by -3 to get x<-5.
Finally, you can simplify the inequality to its final form by flipping the direction of the inequality symbol, since you divided it by a negative number. This gives you the final solution: x>-5.
So, the solution to the inequality −3x−3>12 is x>-5. This means that any value of x that is greater than -5 will satisfy the inequality.
The answer is: x > -5
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Happy Holidays!
You decide to contribute to a mutual fund that averages 3.7% return per year. If you contribute $575 quarterly.
Round all answers to the nearest cent as needed.
a) How much will be in the account after 10 years? $
b) How much of this money did you deposit? $
c) How much of this money is interest earned? $
a) After 10 years, the amount (future value) in the mutual fund will be $27,679.22.
b) The total amount deposited in the mutual fund is $23,000.
c) The amount of interest earned on the quarterly deposits is $4,679.22.
What is the future value?The future value is the compounded present value of periodic deposits.
The future value is compounded at an interest rate per period.
We can compute the future value using an online finance calculator, which also shows the total deposits and interest earned.
N (# of periods) = 40 quarters (10 years x 4)
I/Y (Interest per year) = 3.7%
PV (Present Value) = $0
PMT (Periodic Payment) = $575
Results:
Future Value (FV) = $27,679.22
Sum of all periodic payments = $23,000 ($575 x 40 quarters)
Total Interest = $4,679.22
Thus, making a quarterly deposit of $575 for 10 years at 3.7% APR will yield a future value of $27,679.22.
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given s : t : u = 4 : 9 : 3 and t - u = 30. find the value of s
The value of s from the proportion s : t : u = 4 : 9 : 3 is s = 20
What is Proportion?
The proportion formula is used to depict if two ratios or fractions are equal. The proportion formula can be given as a: b::c : d = a/b = c/d where a and d are the extreme terms and b and c are the mean terms.
Given data ,
Let the proportion be in the form s : t : u
where the value of the proportion is
s : t : u = 4 : 9 : 3
And , t - u = 30
Now , assume the value of s = 4x
where x is the unknown we have to calculate
So , the value of t = 9x
And , the value of u = 3x
From the equation , t - u = 30
Substitute the value of t and u in the equation , we get
9x - 3x = 30
6x = 30
Divide by 6 on both sides of the equation , we get
x = 5
Therefore , the value of x is 5
Now , substituting the value of x in the above equation , we get
s = 4x
s = 4 x 5
s = 20
Therefore , the value of s from the proportion is 20
Hence , The value of s from the proportion s : t : u = 4 : 9 : 3 is s = 20
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In the 1960 Olympics, Wilma Rudolph of the United States won the women's 100 meter run in 11.0 seconds. In 1988, Florence Griffith-Joyner, also of
the United States, won with a time of 10.49 seconds, which is still the fastest women's time to this date. Find the percent of decrease in the winning
time. Round to the nearest tenth
% decrease
Hello,
I hope you and your family are doing well!
To find the percent of decrease in the winning time, you can use the following formula:
percent decrease = (old value - new value) / old value * 100%
Plugging in the values from the problem, we get:
percent decrease = (11.0 seconds - 10.49 seconds) / 11.0 seconds * 100% = 0.51 seconds / 11.0 seconds * 100% = 4.636363636363636%
Rounding to the nearest tenth, the percent of the decrease in the winning time is:
4.6%
This means that the winning time decreased by 4.6% between the 1960 Olympics and the 1988 Olympics.
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In the right-angled triangle ABC, cos C = 4/5 and BC = 16 cm, find the following:
i) AC
ii) AB
The value of (i) AC is the right angled triangle is 20 cm, For (ii) AB is 12 cm.
What is a right angled triangle?A right-angled triangle is a triangle, that has one of its interior angles equal to 90 degrees or any one angle is a right angle.
(i) To calculate the value of /AC/, we use the formula below.
/AC/ = BC/cosC..................... Equation 1From the question,
Given:
BC = 16 cmcosC = 4/5Substitute these values into equation 1
AC = 16/(4/5)AC = 20 cm(ii) To calculate AB, use Pythagoras formula:
a² = b²+c².................. Equation 2From the diagram,
a = AC = 20 cmb = AB = ?c = BC = 16 cmSubstitute these values into equation 2 and solve for AB
20² = b²+16²b² = 20²-16²b² = 400-256b² = 144b = √144b = 12 cmAB = 12 cmLearn more about right angle triangle here: https://brainly.com/question/25016594
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Question 1 of 10, Step 1 of 1
Correct
An economist wants to estimate the mean per capita Income (in thousands of dollars) for a major city in California. He believes that the mean Income is $21.3, and the
variance is known to be $32.49. How large of a sample would be required in order to estimate the mean per capita income at the 99 % level of confidence with an
error of at most $0.39? Round your answer up to the next integer.
n=1422 is the sample that would be required in order to estimate the mean per capita income at the 99 % level of confidence with an error of at most $0.39.
What is meant by confidence level?The fraction of related CIs over the long run that actually contain the parameter's true value is what is meant by the confidence level. The parameter's true value, for instance, should be present in 95% of all intervals computed at the 95% level. The range of values within the 95% confidence interval represents the population's actual mean, with 95% confidence. The sample mean (the center of the CI) will differ between samples due to natural sampling variability. The process itself, not a certain CI, is what inspires confidence. According to the 68-95-99.7 Rule, 95% of values are within two standard deviations of the mean, hence to calculate the 95% confidence interval, one need only add and deduct two standard deviations from the mean.
At 99% confidence interval the critical value is [tex]z_{0.005}[/tex]=2.58
Margin of error=0.39
Or, [tex]z_{0.005}[/tex](σ/√n)=0.39
Or, 2.58(5.7/√n)=0.39
Or, n=(2.58×(5.7/0.39)²
Or, n=1422
n=1422 is the sample that would be required in order to estimate the mean per capita income at the 99 % level of confidence with an error of at most $0.39.
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Difference between 246 and 31 tripled
The difference between 246 and 31 tripled is
246 - 31³ = -29545How to calculate the difference between 246 and 31 tripledThe problem is solved using subtraction
the term difference is similar to subtraction in mathematics
Then tripling is raise to power 3 or exponents of 3, hence after subtraction then exponents is applied to the end result of subtraction to give the answer
The subtraction
= 246 - 31
= 215
The exponents
= 215³
= 215 * 215 * 215
= 9938375
'
On the second thought, we have a different answer in this case
= 246 - 31³
= 346 - 31 * 31 * 31
= -29545
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A 99% confidence interval of 3.551 < p <7.989
means that:
Since the formula for P only applies to positive z, the minus sign must be removed if z is negative.We change 1.96 to 1.65 for a CI of 90%, and we use 2.57 for a CI of 99%.
What is the 99% confidence interval's p value? If z is negative, we omit the minus sign because the formula for P only works for positive z.We substitute 1.65 for 1.96 for a CI of 90%, and 2.57 for a CI of 99%.Similar relationships exist between significance at the 0.01 level and the 99% confidence interval.When an effect is significant, the confidence interval's values will all fall on the same side of zero (either all positive or all negative).Simply said, p-values establish a threshold at which we claim that the results are "statistically significant" (p0.05 being the standard). According to a confidence interval that includes the value of no difference between treatments, the investigated therapy is not substantially different from the control.To learn more about confidence interval refer
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Find the missing angles:
X=_________
Y=_________
Answer:
See below!
Step-by-step explanation:
Statement:When a quadrilateral (shape with 4 sides) in inscribed in a circle, the opposite angles of the quadrilateral add up to 180 degrees.Solution:From the statement, we get:
108 + x = 180
Subtract 108 to both sides
x = 180 - 108
x = 72°Also,
y + 88 = 180
Subtract 88 to both sides
y = 180 - 88
y = 92°[tex]\rule[225]{225}{2}[/tex]
Answer:
X= 72
y= 92
Step-by-step explanation:
108 + x = 180
x = 180 - 108
x = 72°
y + 88 = 180
y = 180 - 88
y = 92
I need help!
The value of __ divided by 32 is greater than 1
Does anyone know?
[tex]x\div 32 > 1\implies \cfrac{x}{32} > 1\implies 32\left( \cfrac{x}{32} \right) > 32(1)\implies x > 32[/tex]
and that can be any value, so long is greater than that, 33 will do, but so does 1,000,000, and so on.
Answer: and that can be any value, so long is greater than that, 33 will do, but so does 1,000,000, and so on.
Step-by-step explanation:and that can be any value, so long is greater than that, 33 will do, but so does 1,000,000, and so on.
and that can be any value, so long is greater than that, 33 will do, but so does 1,000,000, and so on.
Credit card disclosure: "Your due date is at least 25 days after the end of the billing cycle. We will not
charge you interest on new purchases provided that you have paid your previous balance in full by the due
date each month." Identify the true statement.
The 25 days after the end of the billing cycle is referred to as the grace period
If you pay your previous balance in full after the due date, the credit card company will not charge you
interest
days is an exceptionally long period without paying a credit card bill
If you make the minimum payment on your card within the 25 day period, the credit card company will
not charge you interest
If you make the minimum payment on your card within the 25-day period, the credit card company will not charge you interest. Option D is correct.
What is the investment?Investment is defined as when an individual spends money on something that returns him or her higher money than the money they or invest.
Here,
According to the statment, "Your due date is at least 25 days after the end of the billing cycle. We will not charge you interest on new purchases provided that you have paid your previous balance in full by the due date each month"
Since al the option are wrong except option D
Option D is true. because the statement mentioned the same statement as mentioned in the given statment.
Thus, Option D is correct.
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The slope of a curve at each point (x,y) is given by 4x - 1. Which one of the following is an equation fo curve if it passes through the point (-2,3)? A) y = 4x^2 - x - 15 B) y = 2x^2 - x C)y=2r^2-r+7 D) y= 2x^2-1-7
The following is an equation fo curve if it passes through the point (-2,3) is y=2 x^2-x-7.
What is Slope?
A graph is a set of vertices—points—and edges—the lines connecting those vertices in discrete mathematics. Graphs come in a variety of forms, including connected and disconnected graphs, bipartite graphs, weighted graphs, directed and undirected graphs, and simple graphs.
Slope of the carne at (x, y) is 4 x-1
Let the curve is: y=2 x^2-x-7
[tex]$$\begin{gathered}\text { Slope: } \frac{d y}{d x}=\frac{d}{d x}\left[2 x^2-x-7\right] \\\frac{d y}{d x}=4 x-1\end{gathered}$$[/tex]
And passes Iowa's the point (-2,3).
[tex]$$\begin{aligned}& y=2 x^2-x-7 \\& 3=2(-2)^2-(-2)-7 \\& 3=8+2-7 \\& 3=10-7 \\& 3=3\end{aligned}$$[/tex]
Satisfied.
y=2 x^2-x-7
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If 7 is added to twice a number and
this sum is multiplied by 2, the result is
the same as if the number is multiplied by
13 and 9 is added to the product. What is
the number?
Answer: x= -5
Step-by-step explanation:
2(7+2x) = 3x+9
14+4x=3x+9
isolate x
x=-5
El perímetro de un jardín rectangular es 376 m.
Si la longitud del jardín es 99 m, ¿cuál es su anchura?
Answer:
89 m
Step-by-step explanation:
p/2 = 376/2 = 188 m
l + a = 188
a = 188 - l
a = 188 - 99
a = 89 m