9r=3r+6
Subtract 3r from both sides
6r=6
Divide both sides by 6
r=1
2. 3/4
3. equal
4. not equal
5. not equal
6. equal
8. 8/12 2/3
9. draw two squares and divide them both into 3 sections. In the first square color in one section and in the second square color in two sections.
To find the volume of a rectangular prism, we can use the formula [ V = l * w * h ]
V = 5 * 2 1/2 * 1 1/2
V = 12 1/2 * 1 1/2
V = 18 3/4cm³
Now that we know the volume, we can check each answer choice.
Option A:
5 ∙ 2 1/2 ∙ 1 1/2
12 1/2 * 1 1/2
18 3/4cm³
Option B:
12 1/2 ∙ 1 1/2
18 3/4cm³
Option C:
1 1/2(5 + 2 1/2)
1 1/2(7 1/2)
11 1/4cm³
Option D:
1/2(12 1/2 ∙ 1 1/2)
1/2(18 3/4)
9 3/8cm³
Therefore, the only correct options are A and B.
Best of Luck!
2^3=2*2*2
2*2*2+4*8
8+32
=> 40
