3 years ago

What is the value of x? Enter your answer in the box

Mathematics

1 answer:

Ann [662]3 years ago

5 0

5 I think

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How do you find the sum of cube ?

SIZIF [17.4K]

Answer:

$(2x+5)(4x^{2} -10x+25)=0$

Step-by-step explanation:

Given:

The given equation is.

$8x^{3} +125=0$

Find the some of cube.

Solution:

$8x^{3} +125=0$

$2^{3}x^{3} +5^{3}=0$

$(2x)^{3} +5^{3}=0$ ----------(1)

The sum of the cube formula is given below.

$(a^{3} +b^{3})=(a+b)(a^{2} -ab+b^{2} )$ -----------(2)

By comparing equation 1 and equation 2

$a=2x, b=5$

substitute a and b value in equation 2

$((2x)^{3} +5^{3})=(2x+5)((2x)^{2} -(2x)(5)+5^{2})$

$((2x)^{3} +5^{3})=(2x+5)(4x^{2} -(10x)+25)$

$((2x)^{3} +5^{3})=(2x+5)(4x^{2} -10x+25)$

Therefore the sum of the cube $(2x+5)(4x^{2} -10x+25)=0$

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3 years ago

An item is regularly priced at 90$. Itis now priced at a discount of 30% off the regular price. What is the price now ?

frez [133]

If ur getting 30% off, then ur paying 70%
70% of 90...

0.7(90) = 63 <== discount price

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3 years ago

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The difference of three times a number and eleven times it’s square. What’s this equation???

Naddik [55]

Answer:

(N represents a number)

((N^2)x11)-(3xN)

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3 years ago

Find the value of 2^-3 times 3^-2

andreyandreev [35.5K]

Answer:

Step-by-step explanation:

2^-3=1/2^3

3^-2=1/3^2

(2^-3)(3^-2)=1/72

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3 years ago

How do i reflect something on a grid?

Xelga [282]

Answer:

Think of reflect as looking in a mirror. The question should tell you how your reflecting. It might say "reflect the rectangle over the y axis" (Look at the attachment below to see example).

Step-by-step explanation:

I can help more if I see the question. But usually questions ask you to reflect over the y or x axis.

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2 years ago