Which shows the correct simplification of product of powers? 78 · 7-4 = 78· (–4) = 7–32
78 · 7–4 = 78 ÷ (–4) = 7–2
78 · 7–4 = 78 + (–4) = 74
78 · 7–4 = 78 - (–4) = 712

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

college

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step-by-step explanation:

a rotation about point l

step-by-step explanation:

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