135
cross multiply 9*20 then divide by 8
Answer:
Step-by-step explanation:
Amplitude is twice the coefficent of the sine function. In this case, 
Period is
divided by the coefficent of x, in this case, 
Phase shift, is how much you sum or subctract from x inside the sine, in this case
.
Midline you get by hiding the sine and reading what's left, in this case, -4.
Answer:
21 students
Step-by-step explanation:
25% of 28 is 7 28-7=21
Answer:44
Step-by-step explanation:44