an isosceles triangle has two sides of equal length a and a base b the perimeter of the triangle is 15.7 inches so the equation to solve is 2a + b =15.7 if we recall that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side which lengths make sense for possible values of b ?

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

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part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

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step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

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step-by-step explanation: