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Damm [24]
3 years ago
8

t takes Phillip 7 hours to proof a chapter of Hawkes Learning Systems' Intermediate Algebra book and it takes Kim 3 hours. How l

ong would it take them working together? (Round your answer to two decimal places.)
Mathematics
1 answer:
Leya [2.2K]3 years ago
5 0

Answer:

2.1 hrs

Step-by-step explanation:

In 1 hr, Phillip would have proofed 1/7 of the chapter. In 1 hr, Kim would have proofed 1/3 of the chapter. So, together in 1 hr, they would have proofed 10/21 of the chapter. So, it would take 21/10 or 2.1 hrs to proof the whole chapter together.

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Find the circumference and area of a circle with a diameter of 10 inches
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Answer:

c=62.8 a=314

Step-by-step explanation:

to find the circumfrence all you have to do is 2πr

and for area its πr²

8 0
3 years ago
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Lydia is buying cupcake ls for he brother birthday party. She brought 36 cupcakes total.Of the cupcakes she bought,5/6 of them w
quester [9]

Answer:

58.50

Step-by-step explanation:

First find out how many were vanilla and chocolate

vanilla: 5/6 * 36 = 30

Chocolate = total - vanilla = 36-30 =6

Cost for vanilla = 1.50*30 =45

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3 0
3 years ago
Given f(3) = 5x + 5, find f(-4).
larisa86 [58]

Answer:

f(-14)=-15

Step-by-step explanation:

What ever is in the parentheses after the letter (in this case it's f) will be the x value since f(x).

So

f(-4)=5(-4)+5

Then solve.

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4 0
3 years ago
A pot of water is being heated up. The temperature of the water can be modeled by this equation with y representing the temperat
Phoenix [80]
Given function:
y=9.5x+62.1
We have to find the number of minutes x, when y=138.1°F
Put value of y in function.
138.1=9.5x+62.1
Subtract 62.1 from both sides.
76=9.5x
Divide both sides by 9.5.
8=x
or
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8 0
3 years ago
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10. Write the equation of a line going through the points (4,3) and (-8,0).​
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I dont know if it needs to be in slope intercept of general form so i'll give you both.

Answer:

Slope intercept form- y = -1/4x + 4

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7 0
3 years ago
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