Answer:
1
Step-by-step explanation:
Evaluate 5 m + 9 n where m = -7 and n = 4:
5 m + 9 n = 9×4 - 7×5
5 (-7) = -35:
-35 + 9×4
9×4 = 36:
36 - 35
36 - 35 = 1:
Answer: 1
Given
5m + 9n ← substitute m = - 7 and n = 4 into the expression
= (5 × - 7) + (9 × 4)
= - 35 + 36
= 1
