2 years ago

Which equation could be used to find the area in square inches of a circle with a radius of 8 inches?

Mathematics

1 answer:

zzz [600]2 years ago

4 0

Answer:

201.06 square inches.

Step-by-step explanation:

The equation to use to find the Area of a circle is given as

πr²

Where r = radius of the circle

In the question, we are given the radius of the circle = 8 inches

Area of the circle = π × 8²

= 201.06 square inches.

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Find the coefficient of the x^3 in the expansion of (2x-9)^5

il63 [147K]

Use the binomial theorem:

$\displaystyle (2x-9)^5 = \sum_{k=0}^5 \binom5k (2x)^{5-k}(-9)^k = \sum_{k=0}^5 \frac{5!}{k!(5-k)!} 2^5 \left(-\frac92\right)^k x^{5-k}$

The x ³ terms occurs for 5 - k = 3, or k = 2, and its coefficient would be

$\dfrac{5!}{2!(5-2)!} 2^5 \left(-\dfrac92\right)^2 = \boxed{6480}$

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3 years ago

This is in integers. Q: evaluate (+5)-(+9)-(-7)

creativ13 [48]

can be simplified as 5-9+7=-4+7=3

3 0

3 years ago

Read 2 more answers

Do I use LCM or HCF? And how can I decide which to use? (Brainliest if you can answer the whole thing)

kow [346]

Answer:

As far as i know you should go for LCM that would be more convenient and easy to do

4 0

3 years ago

Simplify the expression: –3(9 − x) =

steposvetlana [31]

Answer:

Expand $-3(9-x): -27 + 3x$

Step-by-step explanation:

$-3(9-x)$

Apply the distributive law: $a(b-c)=ab-ac$

$a = -3, b=9, c=x$

$=-3*9-(-3)x$

Apply minus - plus rules:

$-(-a)=a$

$= -3*9+3x$

Multiply the numbers: $3 * 9 = 27$

$=-27+3x$

Hope this helps! If so, may I get Brainliest and a Thanks?

Thank you, have a good one! =)

6 0

2 years ago

(GIVING BRAINLIEST!! Pls help answer the problem and not just the equation!)

Damm [24]

Answer:

1/8

1/2 divided by 4 = 1/8

Step-by-step explanation:

3 0

2 years ago