If 5a – 3b = 7 and b = 2a –4, what is the value of a?

a=5,  b=6

Step-by-step explanation:

Substitute  b = 2a - 4  into  5a - 3b = 7:

5a - 3(2a - 4) = 7

5a - 6a + 12 = 7

a = 5

Now use the found value of a to find b by using  b = 2a - 4:

b = 2(5) - 4 = 10 - 4 = 6

i believe the answer is 68cm

step-by-step explanation:

i just took 34 x 2 because the space between v and y is the same as y to k.

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: