Answer:
y+30
Step-by-step explanation:
the sum of the numbers is 15y
the new sum after increase each number by 30 is 15y+450
the new mean 15y+450/15
= y+30
Answer:
3
Step-by-step explanation:
slopes in parallel are equal
29/33 is already in simplest fraction form
29 is a prime number and cannot be simplified more