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Eddi Din [679]
3 years ago
5

Max and pedro both clean pools. Each charges a flat fee to clean a pool. Max cleans 12 pools in 8 hours and earned $270. Pedro c

leans 9 pools in 7.5 hours and earned $195.75. How many pools do they clean in per hour?
Mathematics
1 answer:
marshall27 [118]3 years ago
3 0

Answer:

The number of pools clean per hour is 1.5

Step-by-step explanation:

Given as :

The number of pools clean in 8 hours = 12

The number of pools clean in 7.5 hours = 9

Let The number of pools they clean per hours = x

I.e x = \frac{8}{12} +  \frac{7.5}{9}

Or, x =  \frac{24+30}{36}

Or, x =  \frac{54}{36}

∴   x =  \frac{3}{2}

I.e x = 1.5

Hence The number of pools clean per hour is 1.5 Answer

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Leno4ka [110]
Y = -X + 7
Y = .5(X-3)2

Alright check it out. Substitute the Y in the second equation for the first equation so...

-X + 7 = .5(X-3)2

After this, you have to get rid of the .5 and the 2 which is easy peasy because they just cancel out. If you were to multiply by half and then multiply by 2 then you'd be back to where you started. So...

-X + 7 = X - 3

Move the X to combine them on one side, I moved the -X to the opposite side by adding X to each side so you get...

7 = 2X - 3

You then add 3 to both side so...

10 = 2X

Divide by 2

X = 5

So...

Y = -5 + 7
Y = 2

Y = .5(5-3)2
Cancel out the .5 and the 2
Y = 5-3
Y = 2

(5,2) is your answer
6 0
3 years ago
Calculate the simple interest rate. (Round your answer to one decimal place.)
GrogVix [38]

Answer:R = 9.1667%/year

Step-by-step explanation:

Solving our equation

r = 330 / (3600 × 1) = 0.09166667

r = 0.09166667

converting r decimal to a percentage

R = 0.09166667 × 100 = 9.1667%/year

The interest rate required to

accumulate simple interest of $330.00

from a principal of $3,600.00

over 1 years is 9.1667% per year.

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8 0
3 years ago
Given the equation f(x) = 35(1.3)x. Which of the following situations could this equation represent?
kramer
Both b and c
I hope it helped u
5 0
3 years ago
Pls help me on this​
lions [1.4K]

Answer:

A. $3

Step-by-step explanation:

20 × 15% =

20 × 15/100 =

20 × 3/20 = 60/20 = 3

3 0
3 years ago
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Find the length of side x.<br> Give your answer to 1 decimal place.<br> 105°<br> 15 cm<br> 18 cm
GalinKa [24]

The image of the triangle is missing, so i have attached it.

Answer:

x = 26.2 cm

Step-by-step explanation:

To find the value of x, we will use cosine rule;

x² = 15² + 18² - 2(15 × 18)cos105

x² = 225 + 324 - 540(-0.2558)

x² = 549 + 138.132

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3 years ago
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