In a certain isosceles triangle, the base is 1 1/2 times as long as each leg and the perimeter is 63. How long is the base?

The base is 27 units long.

Step-by-step explanation:

This is a solve the system question. Call the length of the base B and the length of each leg L. We are told:

and

Sub the first equation into the second:

Now that we have the leg length, sub that into either of the original equations to find the base. I'll use the first equation:

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e

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answer: d.) the total number of protons and neutrons is 15

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