The length of the base of an isosceles triangle is x. The length of a leg is 3x-6. The perimeter of the triangle is 51. Find x

  x = 9

Step-by-step explanation:

The perimeter is the sum of the lengths of the base and the two equal legs:

  51 = x + 2(3x -6)

  51 = 7x -12 . . . . . eliminate parentheses

  63 = 7x . . . . . . . . add 12

  9 = x . . . . . . . . . . divide by 7

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

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: