Answer: 
Step-by-step explanation:
m=
=
90/2=45
45/3=15
15/3=5
90=2*3*3*5=2¹*3²*5¹
Answer:
4. 3
The answer is the last option, all you do is reduce
Step-by-step explanation:
rise over run = rise/run = 6/2
reduce,
6/2
3/1
3x
79-y=2y+22
Add y on both sides
79=3y+22
Subtract 22 from both sides
57=3y
Divide by 3 on both sides
19=y