To do this question you can use proportions.
3/60 is simplified to 1/20.
This shows that if you study 1 hour you get a 20. So to find the answer you multiply each side by 4.5, this means that if you study 4.5 hours you get a 90.
it can be 2 or more real numbers.
Answer:
The correct answer is (d) 36 units.
Step-by-step explanation:
Just took the test on edge :)
Answer:

Step-by-step explanation:
5x-12=3x+20
plus 12 both sides
5x=3x+32
-3x both sides
2x=32
divide by 2 both sides
x=16
(n-1)-3 = (3n)/2 This is the equation used to represent the information given