Answer:
x+10
Step-by-step explanation:
So they did a bet, and placed 5 cents each. George lost the bet that gives Joyce 5 points plus 5 more that make 10.
After the bet George has: x cents
Before the bet George had: x + 5 cents
Before the bet Joyce had also x + 5 cents
Since Joyce won 5 cents, after the bet she has x + 5 + 5 = x + 10 cents.
Signs you're adulting
Conducted by OnePoll on behalf of Avocado Green Brands, a recent survey of 2,000 Americans
delved into the different actions that have helped respondents to feel like an adult. Topping the list
was living on their own (30%) for the first time, followed by buying a house (28%) and getting
married (27%).
a) If we define a "success" as thinking that buying a house makes one feel like an adult, how many
successes would we find in this sample of 2000 Americans?
Give an integer
answer.
b) Construct a 98% confidence interval to estimate the proportion of all Americans who think that
living on their own makes someone feel like an adult, assuming a sample size of 2000 and the
statistics given by One Poll. Give each of the interval endpoints as a percent, rounded to one
decimal places. (
%,
%)
The 98% confidence interval of the proportion of all Americans who think that living on their own makes someone feels like an adult is (29.0%, 31.0%)
The number of successThe given parameters are:
Sample size, n = 2000Probability of success, p =28%The number of success is then calculated as;
[tex]\bar x = np[/tex]
This gives
[tex]\bar x = 2000 * 28\%[/tex]
Evaluate
[tex]\bar x = 560[/tex]
Hence, 560 successes would be found in the sample of 2000 Americans
The 98% confidence intervalThe proportion that lives on their own is:
p = 30%
The z-score for 98% confidence interval is
z = 2.326
The confidence interval is calculated as:
[tex]CI = \bar p \pm z * \sqrt{\frac{\bar p(1 - \bar p)}{ n}[/tex]
So, we have:
[tex]CI = 30\% \pm 2.326 * \sqrt{\frac{30\%(1 - 30\%)}{2000}[/tex]
Evaluate
[tex]CI = 30\% \pm 1\%[/tex]
Expand
CI = (30% - 1%, 30% + 1%)
Evaluate
CI = (29%, 31%)
Hence, the 98% confidence interval is (29.0%, 31.0%)
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What was the percent increase of China's
population from 1970 to 1995?
56.25%
45%
156.25%
9.405%
China's Population
Population
(billions)
0.7
Year
1965
1970
1975
1980
1985
1990
1995
2000
0.8
0.92
0.98
1.08
1.14
1.25
1.26
The percentage increase China's population from 1970 to 1995 is: 56.25%.
How to Calculate Percentage Increase?Percentage increase = (Final Value - Original Value)/Original value × 100.
Given the following:
Original value = 0.8 billion
Final Value = 1.25 billion
Final Value - Original Value = 1.25 - 0.8
Final Value - Original Value = 0.45
Percentage increase = 0.45/0.8 × 100 = 56.25%.
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HELP ME ANSWER THIS PLEASE
Answer:
C , D , B
Step-by-step explanation:
Trigonometry is given by three formulas :
SOH - CAH - TOA
Sin x = Opp/HypHope this helped and have a good day
The number of goals the Blue Jay hockey team scored in each game last year are: 3, 2, 1, 3, 0, 3, 1, 1, 2, 3, 3 What is the mode?
Answer:
3 is the mode
Step-by-step explanation:
A bank loaned out $19,500, part of it at the rate of 11% annual interest, and the rest at 7% annual interest. The total interest earned for both loans was $1,485.00. How much was loaned at each rate?
____ was loaned at 11% and
____was loaned at 7%.
The amount loaned at the interest rate of 11% is $3000.
The amount loaned at the interest rate of 7% is $16,500
What are the linear equations that represent the question?0.11a + 0.07b = 1485 equation 2
Where:
a = amount loaned at the interest rate of 11%
b = = amount loaned at the interest rate of 7%
How much was loaned at 11% and 7%In order to determine how much was loaned at 7%, take the following steps:
Multiply equation 1 by 0.11:
.11a + 0.11b = 2145 equation 3
Subtract equation 2 from equation 3:
0.04b = 660
Divide both sides by 0.04:
b = 16,500
Subtract 16,500 from 19,500 :
19,500 - 16,500 = $3000
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f(x)=x^2-x-1 , average rate of change of f over interval -2 greater than or equal to x less than or equal to 1
The average rate of change within the function f(x)=[tex]x^{2} -x-1[/tex]is -2.
Given The function f(x)=[tex]x^{2} -x-1[/tex]
We have to search out the typical rate of change of function within the interval (-2,1).Interval is largely a variety between numbers lying on the quantity line which may be a line on which different numbers are plotted.
We know that average rate of change =f(b)-f(a)/(b-a)
we have to first know the values of function at different values of x.
f(x)=[tex]x^{2} -x-1[/tex]
f(1)=1-1-1
=-1
f(-2)=4+2-1
=5
b=-2
a=1
put within the formula:
A=-1-5/1+2
=-6/3
=-2
Hence average rate of change of the function within the interval (-2,1) is -2.
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Justin‘s gas tank is 3/10 full after he buys 14 gallons of gas it is 4/5 full how many gallons can Justin‘s tank hold
Answer:
I can help, its 45
who knows how to sketch these kinds of graphs need help asap
Answer:
We first need to know the graph of the basic function belonging to the trigonometric family, which is sin x.
Now we need to apply basics of functions to get the graph of y = -sinx from y = sinx
If x is the input in the y = sinx , then sin x will be the output which will be represented on the y axis. Eg :
If x = pi/2
then output will be y = sin(pi/2) = 1
Hence in the graph of sinx, at x =pi/2 the value of y is 1.
Once we have understood this, we can use the same logic in the case
y = -sinx
If x = pi/2
then output will be y = - sin(pi/2) = -1
Here we can see that the output of y = - sin x will be the exact negative of of the output of y = sinx
Hence all portions of the graph of y = sinx in the +y axis will come down to the -y axis for y = -sin x, i.e we will be taking mirror image of the graph along the x axis. Below are the graphs of y=sinx and y= - sinx respectively for your reference:
(image courtesy Microsoft graphic calculator)
Evaluating an exponential function
Using the given exponential function, we have that:
The initial amount is of 523 grams.The amount after 50 years will be of 165 grams.What is an exponential function?An exponential function is modeled by:
[tex]y = ab^x[/tex]
In which:
a is the initial value.b is the rate of change.In this problem, the function is:
[tex]A(t) = 523(0.5)^{\frac{t}{30}}[/tex]
Hence the initial amount is of 523 grams.
The amount after 50 years will be given by:
[tex]A(50) = 523(0.5)^{\frac{50}{30}} = 165[/tex]
The amount after 50 years will be of 165 grams.
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(3.125) + (-3.9) - (2.46)
Answer:
-3.235Step-by-step explanation:
First, let's start by removing the parentheses and simplifying the expression.
3.125 + - 3.9 - 2.46
Adding a negative number is the same as subtracting it, so we can remove the + sign.
3.125 - 3.9 - 2.46
From there, we can do simple subtraction and get:
-3.235
Super confused new topic please help
Answer:
1960cm squared
Step-by-step explanation:
in case you're still confused ask where you're still confused and I'll offer my assistance.good day.
Currently, professional men’s basketball players score an average of 18.2 points per game with a standard deviation of 4.5 points. the current top-scoring professional basketball player scores an average of 36.2 points per game. in one season in the 1990s, professional basketball players averaged 13.2 points per game with a standard deviation of 3.7 points. the top-scoring professional basketball player averaged 30.1 points per game. which player did better relative to his peers? the 1990s basketball player did better than the current basketball player because his z-score is higher. the current basketball player did better than the 1990s basketball player because his z-score is higher. the 1990s basketball player did better than the current basketball player because his z-score is closer to the mean. the current basketball player did better than the 1990s basketball player because his z-score is closer to the mean.
Hence, the correct option is "The 1990s basketball player did better than the current basketball player because his z-score is higher."
What is an expression?expression is a combination of numbers, variables, and functions (such as addition, subtraction, multiplication or division etc.). This math operation can be addition, subtraction, multiplication, or division. The structure of an expression is: Expression is (Number/Variable, Math Operator, Number/Variable)
How to solve?the correct option is "The 1990s basketball player did better than the current basketball player because his z-score is higher."
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Ibsan want to buy a chicken from one of two supermarkets around his house. the two supermarkets contain 20 local and 25 imported chickens respectively. how many possible chickens are there to choose from
Answer:
Since there are 20 chickens in one supermarket, and 25 chickens in the other supermarket, there are 45 chickens to choose from.
fin the domain of the function f(x)=x^2+7
Answer:
all real numbers
Step-by-step explanation:
Answer:
Step-by-step explanation:
Comment
You are going from a very small number (like - 100000) to a very large number (like + 100000).
But neither of those could be the answer. They are either not small enough or not large enough. The domain must look like this.
- ∞ < x < ∞
Answer: So the domain is all the real numbers.
the diameter of a baseball is appromately 3 inches. What is its volume?Round your answer to the nearest whole number.
The volume of the baseball roundibg off to nearest whole number is 14 cube inches.
If radius of a sphere is r and the volume of that spherical figure is given by V then,
[tex]V=\frac{4}{3}\pi r^3[/tex]
So in the problem the object is a baseball which is a sphere for sure.
Given that the diameter of that baseball is 3 inches.
So the radius of that baseball is given by = 3/2 = 1.5 inches.
Hence the volume of that base ball is
[tex]=\frac{4}{3}\pi\times(1.5)^3 \approx 14.1372 \approx 14[/tex]
Thus the volume of the baseball rounding off to nearest whole number is given by 14 cube inches.
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Jeff places a 13 ft ladder against a wall. The base of the ladder is 5 ft from the wall. How high on the wall does the ladder reach?
Work Shown:
[tex]a^2+b^2 = c^2\\\\5^2+b^2 = 13^2\\\\25+b^2 = 169\\\\b^2 = 169-25\\\\b^2 = 144\\\\b = \sqrt{144}\\\\b = 12\\\\[/tex]
I used the pythagorean theorem.
You work as an assistant for a local musical theatre group, the Main Street Theatre Company. The company is putting on a production of Les Misérables this year, and they need your help planning it.
Since the role of young Cosette is played by a child, the Main Street Theatre company must actually cast 3 girls in the role of young Cosette, and alternate girls from night to night. (This is because of restrictions on working hours for children.) You have received headshots and resumes from 25 girls who wish to audition for young Cosette.
Does order matter when casting the 3 young Cosettes? (In other words, are young Cosette 1, young Cosette 2, and young Cosette 3 different parts?)
No, all three girls will play the same part.
Yes, even though they will all be playing the same part, it will be on different nights.
No, all three girls will get paid the same amount.
Yes, young Cosette 1, young Cosette 2, and young Cosette 3 are all different parts.
The inference based on the information about ordering is that D. Yes, young Cosette 1, young Cosette 2, and young Cosette 3 are all different parts.
What is an inference?It should be noted that a inference simply means the conclusion that can be deduced based on the information given.
In this case, the Main Street Theatre company must actually cast 3 girls in the role of young Cosette.
Hence, young Cosette 1, young Cosette 2, and young Cosette 3 are all different parts. Therefore, ordering matters.
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if the following data were linearized using logarithms, what would be the equation of the regression line? Round the slope and y-intercept of the regression line to three decimal places.
x y
2 73
3 77
4 85
5 101
6 133
A. log(y) =-1.706x + 0.064
B. log(y) =-0.064x + 1.706
C. log(y) = 1.706x + 0.064
D. log(y) = 0.064x + 1.706
The regression equation is (d) log(y) = 0.064x + 1.706
How to determine the regression equation?The table of values is given as:
x 2 3 4 5 6
y 73 77 85 101 133
Calculate the logarithm of the y values.
So, we have:
x 2 3 4 5 6
log(y) 1.86 1.89 1.93 2 2.12
Next, we enter the above values in a regression calculator.
From the calculator, we have the following summary:
Sum of X = 20Sum of Y = 9.8Mean X = 4Mean Y = 1.96Sum of squares (SSX) = 10Sum of products (SP) = 0.63The regression equation is then represented as:
log(y) = bx + a
Where:
b = SP/SSX = 0.64/10 = 0.064
a = MY - bMX = 1.96 - (0.064*4) = 1.706
So, we have:
log(y) = 0.064x + 1.706
Hence, the regression equation is (d) log(y) = 0.064x + 1.706
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Answer: D. log(y) = 0.064x + 1.706
Step-by-step explanation: I got it right on my test
Marisol noticed that she does not have a common factor. which accurately describes what marisol should do next? marisol should realize that her work shows that the polynomial is prime. marisol should go back and group the terms in step 1 as (6x3 – 22x2) – (9x – 33). marisol should go back and group the terms in step 1 as (6x3 – 22x2) (9x – 33). marisol should refactor the expression in step 2 as 2x2(3x 11) – 3(3x 11).
Marisol did a mistake while grouping the terms in Step 1, with the sign. Thus, Marisol should go back and group the terms in Step 1 as (6x³ - 22x²) - (9x - 33). Hence, the second option is the correct choice.
The polynomial Marisol had was 6x³ - 22x² - 9x + 33.
The steps she did in the grouping of terms and factoring out the GFC out of the groups were:
Step 1: (6x³ - 22x²) - (9x + 33).
Step 2: 2x²(3x - 11) -3(3x + 11).
After this Marisol was unable to get a common factor to proceed further.
The mistake that Marisol did was in Step 1, as while grouping -9x and +33, she took the minus sign out, which will make -9x to become 9x, but 33 to become -33.
This is where she made the mistake and writing - (9x + 33) in place of - (9x - 33).
Thus, her steps should have been:
Step 1: (6x³ - 22x) - (9x - 33),
Step 2: 2x²(3x - 11) -3(3x - 11), which gives her a common factor (3x - 11), to continue with the third step:
Step 3: (2x² - 3)(3x - 11).
Refer to the attachment for the complete question, as the given question is incomplete.
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complete the flow chart to prove
someone pls help me pls pls asap
The attached figure represents the complete flowchart.
How to complete the flowchart?The given statement is:
∠1 ≅ ∠2
To prove
∠3 ≅ ∠4
By vertical angle theorem, we have:
∠2 ≅ ∠4
By transitive property of congruence, we have:
∠2 ≅ ∠3
By transitive property of congruence, we have:
∠1 ≅ ∠3
By vertical angle theorem, we have:
∠3 ≅ ∠4
See attachment for the complete flowchart.
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Given ∆ABC with vertices A(−4, −3), B(0, 0), C(2, −3) and ∆DEF with vertices D(3, 1), E(6, -3), F(3, −5), use the definition of congruence in terms of rigid motion to show that ∆ABC ≅ ∆DEF. Describe each rigid motion in terms of coordinates (x, y
By SSS congruency criteria ΔABC ≅ ΔDEF
What is congruency?Two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.
The given vertices of the triangles are;
ΔABC: A(−4, −3), B(0, 0), C(2, −3)
ΔDEF: D(3, 1), E(6, -3), F(3, −5)
The lengths of the sides of ΔABC are
AB = √((0+4)² + (0+3)²) = √25 = 5
BC = √((2-0)² + (-3 - 0)²) = √13
AC = √((2+4)² + (-3 +3)²) = √36 = 6
The lengths of the sides of ΔDEF are;
DE = √25=5
EF = √13
DF = √36 = 6
As,
AB= DE, BC = EF , AC= DF
So, By SSS congruency criteria ΔABC ≅ ΔDEF
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How many different ways can the letters of “Knitting” be arranged
There are actually 5040 ways of arranging the letter knitting.
Consider the following frequency table representing the distribution of hours students study for an exam in a week.
Hours Students Study for an Exam in a Week
Class Frequency
10–20 3
21–31 10
32–42 6
43–53 15
54–64 6
Determine the relative frequency for the third class as a simplified fraction.
The relative frequency of the third class is 3/20.
What is the relative frequency?Relative frequency measures how often a value appears relative to the sum of the total values. It is determined by dividing the frequency of a class by the total frequency.
Relative frequency = frequency of the third class / total frequency
6/(3 + 10 + 6 + 15 + 6)
6/ 40 = 3/20
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3. Which graph represents the solution to 13k-21> 7?
Answer: Option (2)
Step-by-step explanation:
[tex]|3k-2| > 7[/tex] means [tex]3k-2 < -7[/tex] or [tex]3k-2 > 7[/tex].
Solving each of these cases gives [tex]k < -\frac{5}{3}[/tex] or [tex]k > 3[/tex].
So, the answer is Option (2).
I need help asap. ive tired a lot and cant get it
-5(-1) ≤ 55
and
8-y< 12
Step 2 of 4: Solve the second inequality and express your answer in interval notation. Use decimal form for numerical values.
The solution to the inequality is (-4, ∞)
How to solve the inequality?The second inequality is given as:
8 - y < 12
Subtract 8 from both sides
-y < 4
Rewrite as:
y > -4
In interval form, we have:
y = (-4, ∞)
Hence, the solution to the inequality is (-4, ∞)
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Elsa sold 24 drawings for $12 each at the art fair. She is going to use ‡ of the money to buy books. The rest of the money is going into her savings account. How much money will she put into her savings account?
The amount going to her savings accounts is $192
How to determine the amount saved?The given parameters are:
Drawings = 24
Rate = $12
The total amount earned from selling the drawings is:
Total = 24 * $12
Evaluate
Total = $288
She buys books with 1/3.
This means that she saved 2/3
So, we have:
Savings = 2/3 * $288
Evaluate
Savings = $192
Hence, the amount going to her savings accounts is $192
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Find the equation that results from completing the square in the following equation. x^2−20x+75=0
Enter your answer in the binomial square form: (x+2)2=10.
The equation that results from completing the square in the following equation. x^2−20x+75=0 is (x+2)^2 = 10
What is completing the squares method for solving the quadratic equations in one variable?The method "completing the squares", as per the name suggests, try to make the quadratic equation of the form such that the x variable is totally covered in single squared term, as the square of a linear expression in x.
GIven;
x^2−20x+75=0
Subtract 75 from each side
x^2−20x+75 - 75 = -75
Take the coefficient of x
20
Divide by 2
10
Square it
100
Add it to each side
x^2 +5x + 100 = -75 + 100
(x+2)^2 = 10
Take the square root of each side
x+2 = 10
x = 8
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A large washer has an outer radius of 10mm and a hole with a diameter of 14mm. What is the area of the washer? (Use π =3.14)
Answer:
160.14 mm^2
Step-by-step explanation:
Area of a circle = pi r^2
subtract the area of the smaller circle from the larger
note that the smaller radius = 7 mm
pi ( 10^2 - 7^2 ) =
3.14 ( 51) = 160.14 mm^2
The area of the washer is approximately 160.14 square millimeters.
Use the concept of the circle defined as:
A circle is a closed, two-dimensional object where every point in the plane is equally spaced from a central point.
The line of reflection symmetry is formed by all lines that traverse the circle.
Additionally, every angle possesses rotational symmetry around the center.
Given that,
The outer radius of the washer: 10mm
Diameter of the hole: 14mm
π value to be used: 3.14
To find the area of the washer:
Subtract the area of the hole from the area of the outer circle.
The area of a circle is given by the formula A = πr²,
Where r is the radius.
For the outer circle:
The radius is 10mm, so the area of the outer circle = 10²π.
The area of the outer circle = 100π mm²
For the hole,
The diameter is 14mm,
So the radius of the hole = 7 mm.
The area of the hole = 7²π
The area of the hole = 49π mm²
To find the area of the washer,
Subtract the area of the hole from the area of the outer circle:
Area of washer = Area of the outer circle - Area of hole
Area of washer = (100π - 49π) mm²
Area of washer = 51π mm²
Area of washer ≈ 160.14 mm²
Hence,
The area of the washer is approximately 160.14 square millimeters.
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Dana’s phone has zero battery. After charging her phone for one minute it has 2% battery. After 2 minutes her phone has 6% battery. Based on this predict the number of minutes it will takes for Dana to charge her phone battery’s so that it had 50% power and 90% power.
Using the line of best-fit, it is found that:
50% power is obtained after 16.8 minutes.90% power is obtained after 30.1 minutes.How to find the equation of linear regression using a calculator?To find the equation, we need to insert the points (x,y) in the calculator.
In this problem, the points are:
(0,0), (1,2), (2,6).
Hence, using a calculator, the estimate for the battery after x minutes is given as follows:
y = 3x - 0.333.
50% power is obtained when y = 50, hence:
50 = 3x - 0.333
x = 50.333/3
x = 16.8 minutes.
90% power is obtained when y = 90, hence:
90 = 3x - 0.333
x = 90.333/3
x = 30.1 minutes.
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