An equation 2x+y=8 has a solution (2a,9). what is the value of a?

a = -1/4

Step-by-step explanation:

Substitute the given solution into the equations

2x + y = 8

2(2a) + (9) = 8

4a + 9 = 8

Rearrange to get a alone

4a = 8 - 9

4a = -1

a = -1/4

2a = 2(-1/4) = -1/2

Solution = (-1/2, 9)

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft