(r+1)th term of (a +x)^n = nCr a^(n-r)x^r
so 5th term of (3x - 3y)^7 = 7C4 * (3x)^(7-4) (-3y)^4 (NOTE r = 4)
= 35 * 27x^3 * 81y^4
= 76545 x^4y^3
Answer:
1
Step-by-step explanation:

Hope it will help you.
Answer:
Step-by-step explanation:
The bodybuilder gains 1.5 each week for 5 weeks.
If the bodybuilder gains 1.5 for 5 weeks, how many pounds did he gain?
1.5 * 5 = 7.5
Answer:
2
Step-by-step explanation:
Answer:
800%
Step-by-step explanation:
<u>Volume of a square based pyramid</u>

where:
- a = base side length
- h = height
<u>Given values</u> for Pyramid A:
- a = 14 inches
- h = 6 inches
Substitute the given values into the formula to find the volume of <u>Pyramid A</u>:

Given:
- Volume of Pyramid B = 3136 in³
To find how many times bigger Pyramid B is than Pyramid A, divide the <u>volume of Pyramid B</u> by the <u>volume of Pyramid A</u>:

Therefore, the volume of Pyramid B is 8 times bigger than the volume of Pyramid A.
8 as a percentage is 800%, since 800/100 = 8.
Therefore, the volume of Pyramid B is 800% the volume of Pyramid A.
To verify this, find 800% of the volume of Pyramid A:
⇒ 800% of 392
= 800/100 × 392
= 8 × 392
= 3136