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kipiarov [429]
3 years ago
14

Hey, I have some algebra questions, I need to complete for tomorrow. One of them is: Simplify 4a + 12a. ​

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
3 0

Answer:

16a

Step-by-step explanation:

4a+12a=16a since they are the same variables.

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The length of a rectangle is (x - 9) feet. Its width is x feet. Write an expression you could use to find the perimeter
steposvetlana [31]

Answer:

The expression for the perimeter of the rectangle is: P = 4x - 18

Step-by-step explanation:

Perimeter of a rectangle:

A rectangle has length l and width w. It's perimeter is given by:

P = 2(l + w)

In this question:

l = x - 9, w = x

So

P = 2(x - 9 + x) = 2(2x - 9) = 4x - 18

The expression for the perimeter of the rectangle is: P = 4x - 18

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3 years ago
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Answer:

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Petra jogs 5 miles in 40 minutes. At this rate, how long would it take her to jog 7 miles? Petra would take minutes to jog 7 mil
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