Question

Write the missing numbers so that 2a + 5b = 30

One is done for you.

2a + 5b = 30 when a = 0 and b = __30_____

2a + 5b = 30 when a = 5 and b = _______

2a + 5b = 30 when a = 15 and b = _______​

Answer 1

1. 2a+5b=30 if a =0 5b=30 and 30/5=b=6

2.a=5 2.5+5b=30 10+5b=30 5b=20 b=20/5=4

3.a=15 2.15+5b=30 30+5b=30 5b=0 b=0

Answer 2

when a = 0

Substitute a = 0 into 2a + 5b = 30

2(0) + 5b = 30

5b = 30

b = 6

2a + 5b = 30

when a = 5

Substitute a = 5 into the above Equation

2(5) + 5b = 30

5b = 30-10

5b = 20

b = 4

when a = 15

Substitute a into 2a + 5b = 30

2(15) + 5b = 30

5b = 30-30

5b= 0

b = 0

Hope this helps.