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<span>The 1/2 stretches the period from 2pi to 4pi and the amplitude stays the same. If the equation was y=2sin(x) then the amplitude would be 2.</span>
Answer:
x=21
Step-by-step explanation:
Following the vertical angles, we can assume that the equation that has x and 87 are equal to each other. From then, you set them equal to each other and solve for x.
87=4x+3
84=4x subtract 3 from both sides
21=x divide by 4 to get the x alone on both sides