This is really easy.
x-4=8
what it really is asking you is the value of x
Isolate x
take 4 to the other side. not -4 but positive 4
x=12
1 3/4 hours* (2/3)= 1 1/6 hours.
They spent 1 1/6 hours studying insects~
12 A . my guess would be to divide 2175 by 18 which would give you 120.83
So what I think you do is that yu have to simplify or divide. Good luck! - from: a 7th grader
Beginning with the function y = sin x, which would have range from -1 to 1 and period of 2pi:
Vertical compression of 1/2 compresses the range from -1/2 to 1/2
Phase shift of pi/2 to the left
Horizontal stretch to a period of 4pi, as the crests are at -4pi, 0, 4pi
Vertical shift of 1 unit up moves the range to 1/2 to 3/2
So the first choice looks like a good answer.
