Answer:
Jenny has 50 marbles
Step-by-step explanation:
I find it easiest to right down the numbers as I read the question,
(9+10-4) x3 +7-2
Answer: Ron tower's
Step-by-step explanation:
Given
Ron tower has a base of 
Freddy tower has a base of 
Suppose the tower is in the shape of a square prism
The volume of Ron and Freddy tower is 
The volume of a square-based prism is

The height of Freddy tower is

Thus, the height of Ron's tower is more than Freddy's tower by 
Answer:
Hello! 3 1/8 is a mixed fraction.
Step-by-step explanation:
35 : 10 = 7*5 : 2*5 = 7 : 2
Thus 35 : 10 = 7 : 2;
but 35:10 ≠ 7:5