Answer:17
Step-by-step explanation:
2x=5x−51
−3x=−51
x=
3
51
x=17
Taylor charges $15 for the first hour of dog walking and $10 for each additional
hour or fraction of an hour. The rates that Lucy charges for x hours of dog walking
are modeled with the function shown.
f(x) =
{
20x, 0
10x. 2
5x, x >4
Who will charge more to walk a dog for 2.5 hours, Taylor or Lucy? How much more?
Who?:
How much more?:
Answer:
The answer is below
Step-by-step explanation:
Let x represent the number of hours of dog walking. Taylor charges $15 for the first hour and $10 for each additional hour. Therefore:
Let g(x) represent how much Taylor charges. Hence:
g(x) = 15 for 0 ≤ x ≤ 1
g(x) = 15 + 10(x - 1) = 15 + 10x - 10 = 10x + 5 for x > 1
g(x) can be represented by the piecewise function:
[tex]g(x)=\left \{ {{15\ \ \ \ \ \ for\ 0\leq x\leq 1} \atop {10x+5\ \ for\ x>1}} \right.[/tex]
Lucy charges f(x) is modeled by the piecewise function:
[tex]f(x)=\left \{ {{20x\ \ \ \ \ \ for\ 0\leq x\leq 2} \atop {10x\ \ \ for\ 0< x< 4}} \right.[/tex]
Therefore the charge for walking a dog for 2.5 hours by either Taylor or Lucy is:
For Taylor; f(2.5) = 10(2.5) + 5 = $30
For Lucy; g(2.5) = 10(2.5) = $25
Therefore Taylor charges more by walking a dog for 2.5 hours. Taylors charge is $5 more than Lucy charge ($30 - $25).
A friend has offered to play a gambling game with you that involves flipping a coin that she has provided. You want to test the coin in advance for fairness before agreeing to gamble. Your friend is willing to let you flip it 50 times to determine if the probability of getting heads is actually 0.50, as it should be if the coin is fair. Is it necessary to check the 10% condition in this case
Answer:
The 10% condition would not apply here
Explanation:
The 10% condition is the recommended size of sample from the population to get a non biased result. The 10% condition requires that the sample be not more than 10% of the population.
Tossing a coin is an example of a Bernoulli trial. A Bernoulli trial is one that has two possible outcomes, this face of the coin or the other face of the coin. The 10% condition does not apply to Bernoulli trials that are independent events.
Therefore the 10% condition would not apply here because tossing a coin is an an independent event. An independent event is one with replacement.
The surface area of a ball is 576 pi square millimeters. What is the ball’s radius? Recall the formula S A = 4 pi r squared. 12 millimeters 14 millimeters 24 millimeters 48 millimeters
Answer:
r = 12 millimeters
Step-by-step explanation:
Surface area of a ball = 4πr²
Surface area of a ball = 576 pi square millimeters
Surface area of a ball = 4πr²
576π = 4πr²
r² = 576π / 4π
r² = 144
Find the square root of both sides
√r² = √144
r = 12
r = 12 millimeters
Answer:
The answer is 12 millimeters
Step-by-step explanation:
I'm doing it rn
2) An $80 text book was on sale for $49.60 at the used book store. By what percent did the book decrease in price?
The answer fam is......... 38%
Answer: 38%
Step-by-step explanation:
80x0.62=49.60
what do you call two math teachers who bowl?
Answer:
69
Step-by-step explanation:
Find the vertex and focus of the parabola.
y^2 - 12y + 4x + 4 = 0
Answer:
Vertex: (8,6) Focus (7,6)
Step-by-step explanation:
32/4=8
Half of 12=6
Marcin buys 7 rulers and 15 crayons for £7.
A ruler costs 12p more than a crayon.
Find the cost of one crayon.
Answer: 28 p is the cost of one crayon.
What is multiplication?In mathematics, multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.
here, we have,
Marcin buys 7 rulers and 15 crayons for £7.
A ruler costs 12p more than a crayon.
now,
To solve this problem we're going to use an equation.
First let's write down the information that we do know.
Let's use (r) for ruler and (c) for crayon.
So 7 rulers and 15 crayons cost £7 (or 700 pennies)
--> 7r + 15c = 700
But we also know that r = c +12
So we can substitute c + 12 into the first equation where r is at the moment.
7(c+12) + 15c = 700
Now let's expand the brackets.
We multiply 7 by c to get 7c
and 7x12 t0 get 84
7c + 84 +15c = 700
22c + 84 = 700
Here I'm going to take 84 away from both sides.
22c = 616
616 divided by 22 is 28
so c = 28
hence, Each crayon therefore costs 28p.
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the sum of 17 and 3 times x
Answer:
20x?
Step-by-step explanation:
Answer:
it will = 17+3x. hope it helps
If the triangles are congruent,
then y = [?].
4x+1
13
2x+y
8x-2y
Answer:
4x+1
Step-by-step explanation:
The way i got this was because sometimes on shapes there are 4 side and so you would multiply the number of sides then add some more to it.
Please help with this I really need it
Answer:
Step-by-step explanation:
9. When Diego's phone is fully charged, it will last 18 hours. How much time 1 point
is left on his phone when the battery has 15% charge remaining? *
Answer:
2.7 hours
Step-by-step explanation:
Assuming that each percentage is worth the same amount of time. Then we can use the Rule of three since this is a ratio problem and we are given three values and a variable which is the amount of time that the battery lasts at 15%. This variable is represented by the letter x. To solve this we simply multiply the diagonal values and divide by the last remaining value which gives us the value of the variable like so...
100% <====> 18 hours
15% <====> x hours
(15 * 18) / 100 = 2.7 hours
Finally, we can see that 15% charge on the phone will last 2.7 hours
Predict whether the product will be greater than, less than or equal to the second factor. 1/5 x 3/4
Answer:
14
Step-by-step explanation:
On Sunday, Sheldon bought 412 kg of plant food. He used 123kg on his strawberry plants and used 14 kg for his tomato plants.
How many kilograms of plant food did Sheldon have left? Write one or more equations to show how you reached your answer.
Answer:
275
Step-by-step explanation:
412kg - 123kg - 14kg = 275kg left
Because he used 275 kg out of 412kg
Divide. Reduce the answer to lowest terms. 2/7 • 15/7
A particular electric utility charges customers different rates depending on their daily rate of energy consumption: $0.05/kWh up to 20 kWh, and $0.10/kWh for all energy usage above 20 kWh in any 24-hour period. (a) Calculate how many 100 W light bulbs can be run continuously for less than $10 per week. (b) Calculate the daily energy cost if 2000 kW of power is used continuously.
Answer:
(a) the number of 100W light bulbs is 11
(b) the daily cost of 2000 kW is $4,800
Step-by-step explanation:
charge of energy consumption up to 20 kWh = $0.05/kWh
charge of energy consumption above 20 kWh = $0.10/kWh
(a) number of 100 W light bulbs that can be run continuously for less than $10 per week
Total energy consumed by 100 W in 1 week = (0.1 kW) x (7 x 24 h)
= 16.8 kWh
Charge associated with this consumption = $0.05/kWh
let the number of 100 W light bulbs = n
[tex]n(\frac{\$ 0.05}{kWh} \times 16.8 kWh) = \$10\\\\n(0.84) = 10\\\\n = \frac{10}{0.84} \\\\n = 11.9[/tex]
Since 0.9 is not a whole number, the number of 100 W light bulbs is 11.
(b) if 2000 kW is used continuously
total energy consumption = 2000 kW x 24 h = 48,000 kWh
The daily cost is calculated as;
[tex]= \frac{\$0.10 }{kWh} \ \times \ 48,000 kWh\\\\= \$ 4,800[/tex]
A particular electric utility charges customers different rates depending on their daily rate of energy consumption :
(a) the number of 100W light bulbs is 11
(b) the daily cost of 2000 kW is $4,800
"Energy Consumption"Given :
Charge of energy consumption up to 20 kWh = $0.05/kWh
Charge of energy consumption above 20 kWh = $0.10/kWh(
Part a)
Number of 100 W light bulbs that can be run continuously for less than $10 per week
Total energy consumed by 100 W in 1 week = (0.1 kW) x (7 x 24 h)Total energy consumed by 100 W in 1 week = 16.8 kWhCharge associated with this consumption = $0.05/kWh
Let the number of 100 W light bulbs = n[tex]n\left(\frac{\$0.05}{kWh}\cdot16.8kWh\right)=\$10\\n\left(0.84\right)=10\\n=\frac{10}{0.84}\\n=11.9[/tex]
Since 0.9 is not a whole number.
Thus, the number of 100 W light bulbs is 11.
Part b)
2000 kW is used continuously
Total energy consumption = 2000 kW x 24 h
Total energy consumption = 48,000 kWh
The daily cost is calculated by:
[tex]\frac{\$0.10}{kWh}\cdot48000\ kWh
Daily cost=\$4800[/tex]
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emily paints at a constant rate. she can paint 32 square feet in 5 minutes. what area,A, in square feet, can she paint in t minutes? a. write the linear equation in two variables that represents the number of square feet Emily can paint any given time interval.
Answer: A(t) = (6.4 ft^2/min)*t
Step-by-step explanation:
We know that Emily paints at a constant rate, and she can paint 32 ft^2 in 5 minutes.
Then if we take the quotient of these two quantities, we will find the amount she can paint in one minute, this is:
32ft^2/5min = (32/5) ft^2/min = 6.4 ft^2/min.
Then if she paints for t minutes, the area that she can cover can be written as:
A(t) = (6.4 ft^2/min)*t
This is the linear equation we wanted to find.
How many % cup servings are in % cup?
Answer:
I can't see all the answers
What is the complete factorization of the polynomial below?
x3 + 8x2 + 19x + 12
O A. (x+4)(x+3)(x+1)
O B. (x + 4)(x-3)(x - 1)
C. (x+6)(x + 2)(x+1)
O D. (x+6)(x-2)(x-1)
Using the Factor Theorem, it is found that the complete factorization of the polynomial x³ + 8x² + 19x + 12 is given by:
A. (x+4)(x+3)(x+1)
What is the Factor Theorem?The Factor Theorem states that a polynomial function with roots [tex]x_1, x_2, \codts, x_n[/tex] is given by:
[tex]f(x) = a(x - x_1)(x - x_2) \cdots (x - x_n)[/tex]
In which a is the leading coefficient.
In this problem, using a calculator, the roots of the polynomial x³ + 8x² + 19x + 12 are x = -4, x = -3 and x = -1, hence:
f(x) = (x + 4)(x + 3)(x + 1)
Which means that option A is correct.
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at the beginning of the school year Anderson Middle School had 480 students at the end of the year it had 504 students what is the percent of change in the enrollment
Answer:
The number of enrollments increased by 5%.
Step-by-step explanation:
Given that:
Number of students at the beginning of the year = 480
Number of students at the end of the year = 504
Change = 504 - 480 = 24
This indicates increase.
Percent of change = [tex]\frac{Change}{Old\ number\ of\ students}*100[/tex]
Percent of change = [tex]\frac{24}{480}*100[/tex]
Percent of change = 5%
Hence,
The number of enrollments increased by 5%.
help me asap pls pls
Answer:
11(7+4)=22 7+4=18 here i think it help for u
Two hundred people responded to a survey. Of those who had green eyes, 7 had blonde hair, 9 had brown hair, and 2 had red hair. Construct a two-day table to display these data. Then identify the least common combination of eye and hair color. Explain.
Answer:
18
Step-by-step explanation:
A government agency hires you to provide consulting on new rules regarding vehicle license plates. The agency is considering an all-numbers license plate that has six slots (digits 0-9 with no duplicate digits allowed). How many possible license plates are there
Answer:
There are 151,200 possible license plates.
Step-by-step explanation:
The order in which the digits are positioned is important(for example, 012345 is a different plate than 102345). No repeat digits are allowed, which means that we use the permutations formula to solve this question.
Permutations formula:
The number of possible permutations of x elements from a set of n elements is given by the following formula:
[tex]P_{(n,x)} = \frac{n!}{(n-x)!}[/tex]
In this question:
There are 10 possible digits(from 0 to 9).
The plate has 6 slots.
So
[tex]P_{(10,6)} = \frac{10!}{(10-6)!} = 151200[/tex]
There are 151,200 possible license plates.
The volume, of a rectangular solid with length L, width W, and height H is given by the formula V = LWH.
Use this formula to write a polynomial in standard form that models, or represents, the volume of the open box.
The volume of the open box is ____
Answer:
[tex]V(x) = 4x^3-34x^2+66x[/tex]
Step-by-step explanation:
Polynomials
We'll apply the polynomials to geometry.
The volume of a rectangular box can be calculated as
V = LWH
Where L is the length, W is the width, and H is the height of the box.
The figure shows the three dimensions as a function of the variable x:
W = 6 - 2x
L = 11 - 2x
H = x
Substituting in the formula of the volume:
[tex]V(x) = (11-2x)(6-2x)(x)[/tex]
Multiplying the first two factors:
[tex]V(x) = (66-22x-12x+4x^2)(x)[/tex]
Simplifying:
[tex]V(x) = (66-34x+4x^2)(x)[/tex]
Multiplying by x:
[tex]V(x) = 66x-34x^2+4x^3[/tex]
Reordering:
[tex]\boxed{V(x) = 4x^3-34x^2+66x}[/tex]
10
Which of the following is the midpoint between (3, 2) and (-3, 4)?
(0, 3)
(0, 3/2)
(6, 3/2)
(-6, 3)
Answer:
(0, 3)
Step-by-step explanation:
(0, 3) is the following is the midpoint between (3, 2) and (-3, 4)
Account A has a simple annual interest rate of 2% and Account B has a simple annual interest rate of 3.5%. How much more interest do you eam per year when
you deposit x dollars in Account B instead of A?
9514 1404 393
Answer:
0.015x
Step-by-step explanation:
The amounts earned at the different rates are ...
at 2%: 0.02x
at 3.5%: 0.035x
The difference in earnings is ...
0.035x -0.02x = 0.015x
Given that WXYZ is a rectangle and ZY=2x + 3, and WX=x +4, then WX=
Answer:
7
Step-by-step explanation:
Answer:
WX = 5
Step-by-step explanation:
2x + 3 = x + 4
x = 1
WX = 2(1) + 3 = 5
A person operating a machine can mow 0.75 acres in 1/2 hour. What is the rate, in acres per hour, that the person can mow? Write your answer as a decimal.
Answer:
1.5 acres per hours
Step-by-step explanation:
.75 is half an hour so just double the .75 to get the rate of an hour
Answer:
1.5 acres per hours
Step-by-step explanation:
im just smart like that
62.837 expanded form decimal
Answer:
60+2+0.8+0.03+0.007
Step-by-step explanation:
1. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: s + 7 *
2. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 5r - 4 *
3. if r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: t - s *
4 .If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: u + r *
5. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 11t - 7 *
6. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 6 + 3u *
7. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: 4r - 10s *
8. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: (r with an expnent of 2 +8)
9. If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: *
30 over r
10.If r = 5, s = 2, t = 7, and u = 1 then evaluate the expression: *2t with an exponent of 2-18
Answer:
1. s + 7 = 9
2. 5r - 4 = 21
3. t - s = 5
4. u + r = 6
5. 11t - 7 = 70
6. 6 + 3u = 9
7. 4r - 10s = 0
8. r with an expnent of 2 +8 = [tex]r^{2} + 8 = 33[/tex]
9. 30 over r = [tex]\frac{30}{5}[/tex] =6
10. 2t with an exponent of 2-18 = [tex](2t)^{2} - 18 = 178[/tex]
Step-by-step explanation:
1. If r = 5, s = 2, t = 7, and u = 1 then,
s + 7 = 2 + 7 = 9
2. If r = 5, s = 2, t = 7, and u = 1 then,
5r - 4 = 5(5) - 4 = 25 - 4 = 21
3. if r = 5, s = 2, t = 7, and u = 1 then,
t - s = 7 - 2 = 5
4 .If r = 5, s = 2, t = 7, and u = 1 then,
u + r = 1 + 5 = 6
5. If r = 5, s = 2, t = 7, and u = 1 then,
11t - 7 = 11(7) - 7 = 77 - 7 = 70
6. If r = 5, s = 2, t = 7, and u = 1 then,
6 + 3u = 6 + 3(1) = 6 + 3 = 9
7. If r = 5, s = 2, t = 7, and u = 1 then,
4r - 10s = 4(5) - 10(2) = 20 - 20 = 0
8. If r = 5, s = 2, t = 7, and u = 1 then,
r with an exponent of 2 +8 = [tex]r^{2} + 8 = 5^{2} + 8 = 25 + 8 = 33[/tex]
9. If r = 5, s = 2, t = 7, and u = 1 then,
30 over r = [tex]\frac{30}{r} = \frac{30}{5} = 6[/tex]
10.If r = 5, s = 2, t = 7, and u = 1 then,
2t with an exponent of 2-18 = [tex](2t)^{2} - 18 = (2.7)^{2} - 18 = (14)^{2} - 18 = 196 - 18 = 178[/tex]
7x
5x+18
Find the size of the smallest angle
Answer
Not sure is there supposed to be a pic?
Step-by-step explanation: