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3 years ago

I know the answer but I don’t know how to solve it

Mathematics

2 answers:

svlad2 [7]3 years ago

7 0

Answer: b

Step-by-step explanation:

inessss [21]3 years ago

4 0

I can't see the question

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What is the answer to 8x^3+125 by factoring the perfect cube?

expeople1 [14]

Answer:

$\large\boxed{8x^3+125=(2x+5)(4x^2-10x+25)}$

Step-by-step explanation:

$8x^3+125=2^3x^3+5^3=(2x)^3+5^3\\\\\text{use}\ a^3+b^3=(a+b)(a^2-ab+b^2)\\\\=(2x+5)((2x)^2-(2x)(5)+5^2)\\\\=(2x+5)(4x^2-10x+25)$

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3 years ago

Solve the inequality: x^2 - 2.2x + 1.21

Scorpion4ik [409]

No solution / no x

D=b^2-4*a*c -> D=-4^2-4*1*21 -> D=-28 -> D<0, no solution

3 0

3 years ago

On a coordinate plane, solid circles appear at the following points: (negative 3, negative 3), (negative 3, 2), (1, 1), (2, nega

FinnZ [79.3K]

Answer:

ITS (3-2.) Thank me later

4 0

2 years ago

Read 2 more answers

51 correct 9 incorrect as a fraction

BARSIC [14]

5 and 2/3 because 51/9= 5.666666667, which .66666667 in fraction form is 2/3

6 0

3 years ago

Devisibility rules for 3, 6, and 9

fenix001 [56]

Answer:

★ Divisibility rule for 3 -

If the sum of all the digits divisible by 3 then the number is divisible by 3.

Here, we take an example for better understanding -

Example 1 - 3525

Add up the digits - 3 + 5 + 2 + 5

→ 15

As, 15 is divisible by 3. So, 3525 is a factor of 3.

★ Divisibility rule for 6 -

A number is to be divisible by 6 , if the number is also divisible by 2 and 3.

Example 2 - 132

Add up the digits = 1 + 3 + 2 = 6

As, 6 is divisible by 2 and it's also divisible by 3. Then, 132 is a factor of 6.

★ Divisibility rule for 9 -

If the sum of all the digits is divisible by 9 then the number is divisible by 9. Just like we'd in 3.

Example 3 - 1052

Add up the digits - 10 + 5 + 2 = 17

As, 17 is not divisible by 9. So, 1052 is also not divisible by 9.

3 0

3 years ago