Question

I need help i dont understand this​

Answer 1

D

Explanation:

Given the 2 equations

4x + 8y = 21 → (1)

y = -
`(1)/(2)` x + 3 → (2)

Substitute y = -
`(1)/(2)` x + 3 into (1)

4x + 8(-
`(1)/(2)` x + 3 ) = 21 ← distribute parenthesis on left side

4x - 4x + 24 = 21 ( subtract 24 from both sides )

0 = - 3 ← not possible

This indicates the system has no solutions