You can use the law sines, which states that in a triangle the ratio between one side length and the sine of the opposite angle is constant.
So, we have

In particular, we can use

to write

Which means

The first one is y=125t+60
4 and a half is 4.5, and if you divide 3 into that, you get 1.5.
Answer: 1.75
Step-by-step explanation:
5.25 / 3 = 1.75
1.75 x 4 = 7
7 + 5.25 = 12.25
1.75 x 7 = 12.25
since they are the same answer it's right