Answer:

Step-by-step explanation:
First we have to make the fractions even so there denominator have to be equal. So 15 times 2 gets 30 and 6 times 5 gets 30 too. Now multiply the numerator by the corresponding number of 25/30 and 16/30. Subtract to get 9/30 now simplify to get 3/10.
Answer:
A) 30 cubes.
B) 30 units³.
Step-by-step explanation:
A) 1. Calculate the volume of the rectangular prism, as following:

2. You have that:
- The length is: 
- The width is: 
- The heigth is: 
3. Substitute these values into the formula:

4. The volume of one cube is:

5. The length of one side is: 
6. Substitute this value into the formula:

7. The number of small cubes that can be packed in the rectangular prism is:

B) 1. The length, the width and the height of the rectangular prism in term of units cubes is:



2. Therefore, the volume of the rectagular prism in terms of the small cube and a unit cube is:

Answer:
7 : 17.29
Step-by-step explanation:
==>Given:
Two similar cylinders:
Surface area of Cylinder A = 49cm²
Surface area of Cylinder B = 121cm²
==>Required:
Scale factor between both cylinders
==>Solution:
We can easily get the scale factor between both by taking the following steps:
=>Set up a ratio of their surface area:
Smaller cone surface area : larger cone surface area
49:121
= 49/121
=>Simplify the ratio gotten:
Dividing the denominator and the numerator by 7, would give us,
7/17.29
= 7:17.29
Step-by-step explanation:
x > -1
x = {0,1,2,...}

The answer is 35,000
To get this I multiplied 7*5 first (35) then added three zeros because 1000 has three zeros.
Hope this helped :)