Answer:
397
Step-by-step explanation:
67 + 90 + (40 x 6)
PEMDAS
Parentheses first
67 + 90 + 240
Then add
157+240
Answer:15 meters higher
Step-by-step explanation: 30-30+15
Answer: -101
Step-by-step explanation: f(n) = 19-6*n
f(20) = 19 - 6*20
f(20) = -101
10^2+2×2b×10+2b^2 = 100+40b+2b^2
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Is 3 cm the height of the triangle?
