Which mental math strategy can be used to find the exact sum of 873 and 47? Check all that apply?
1 answer:
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Answer:
D -9
Step-by-step explanation:
(g o f)(-1) = g(f(-1))
f(-1) =
g(-4) = -4 - 5 = -9
So, (g o f)(-1) = -9
Answer:
x = 31.2
Step-by-step explanation:
x - 19.7 = -4.1
x = 15.6 --- add 19.7 to both sides to get rid of -19.7
x = 31.2 --- multiply both sides by 2 to get rid of