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SashulF [63]
2 years ago
10

Hep I’m trash at math

Mathematics
2 answers:
sergejj [24]2 years ago
6 0
Sameeeeeeeeeeeeeeeeeee
puteri [66]2 years ago
5 0

Step-by-step explanation:

\pi {r}^{2}  \frac{h}{3}

π×4×4×8/3

π×16×8/3

128/3×π

128/3π cm²

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What method would you choose to solve the equation 2x^2-7=9
Margaret [11]
Here is one way to solve for x.

Step 1)  2x^2-7=9

Step 2)  2x^2-7+7=9+7

Step 3)  2x^2=16

Step 4)  (2x^2)/2=16/2

Step 5)  x^2=8

Step 6)  sqrt(x^2)=sqrt(8)

Step 7)  |x|=sqrt(8)

Step 8)  x=sqrt(8) or x=-sqrt(8)

-------------------------------------

Below are explanations/reasons to each of the steps above.

Step 1) Original equation

Step 2) Add 7 to both sides

Step 3) Combine like terms

Step 4) Divide both sides by 2

Step 5) Simplify

Step 6) Apply the square root to both sides. The notation "sqrt" is shorthand for "square root"

Step 7) Use the rule that sqrt(x^2) = |x| for all real numbers x

Step 8) Use the rule that if |x| = k then x = k or x = -k for some fixed number k.

-------------------------------------

The two solutions are
x = sqrt(8) or x = -sqrt(8)

3 0
3 years ago
Write a compound inequality to represent all of the numbers between -4 and 6.
OlgaM077 [116]
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pav-90 [236]
I believe that woud be 2/9
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Step-by-step explanation:

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