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tamaranim1 [39]
3 years ago
13

What is the solution to the following equation ? plz help x +(-21)=8

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
8 0

Answer:

x = 29

Step-by-step explanation:

x +(-21)=8

x = 8 + 21

x = 29

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You get scores of 72 and 88 on 2 science tests. You have to have an average of at least 85 to not be grounded by your parents. W
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95

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We can find the volume of a sphere using the volume of a cylinder. Cylinder is a solid which has a circular base. We know the fact that the volume of any solid is equal to the product of base area and height of the solid. So, the volume of a right circular cylinder of base radius ‘r’ and height ‘h’ is given by

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2 years ago
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42 - x


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5 0
3 years ago
WILL GIVE BRAINLIEST, THANKS, AND 5 STARS!<br> PLEASE HELP ME!
Bogdan [553]

Answer:

-4 and 4

Step-by-step explanation:

<u>Method 1</u>

Apply Difference of Two Squares Formula: a^2-b^2=(a+b)(a-b)

Given  x^2-16=0

Rewrite 16 as 4²

Therefore, a^2=x^2 and b^2=4^2

\implies a = \sqrt{x^2}=x

\implies b=\sqrt{4^2} =4

\implies x^2-16^2=(x+4)(x-4)

\implies (x+4)(x-4)=0

\implies (x+4)=0 \implies x=-4

\implies (x-4)=0 \implies x=4

<u>Method 2</u>

Given equation:

x^2-16=0

Add 16 to both sides:

\implies x^2-16+16=0 + 16

\implies x^2=16

Square root both sides:

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\implies x=\pm4

Therefore, x = -4, x = 4

6 0
2 years ago
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