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2 years ago

Which is the most efficient way to solve this equation?

Mathematics

2 answers:

Alona [7]2 years ago

7 0

Answer:

subtracting 7 from 12

Step-by-step explanation:

That would be most efficient. Subtracting seven from twelve will quickly give you your value of x without moving the x itself. And there's no negatives

mariarad [96]2 years ago

3 0

Answer:

Add -7 to both sides because that will result in an equivalent

equation with x alone on one side

Step-by-step explanation:

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Rational number between 9.6 and 9.7

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3 years ago

3z + 2 + (-52) + 6<br> Help !!!

Norma-Jean [14]

Answer:

3z-44

Step-by-step explanation:

All you have to do is to simplify the numbers. 2 + 6 - 52 = -44.

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2 years ago

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2 years ago

(3x+7)(3x-7) if necessary combine like terms

34kurt

Answer:

9x^2 -49

Step-by-step explanation:

We recognize that this is of the form

(a+b)(a-b) = a^2 - b^2

3x = a and 7 =b

(3x)^2 - 7^2

9x^2 -49

3 0

3 years ago

What is the area of a sector with a central angle of (2pi/3) radians and a diameter of 12 in?

Stels [109]

Answer:

The area of the sector is $37.68\ in^{2}$

Step-by-step explanation:

step 1

Find the area of the circle

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=12/2=6\ in$ ----> the radius is half the diameter

substitute

$A=(3.14)(6)^{2}$

$A=113.04\ in^{2}$

step 2

Find the area of a sector with a central angle of (2pi/3)

Remember that

The area of $113.04\ in^{2}$ subtends a central angle of $2\pi \ radians$

by proportion

Let

x----> the area of the sector

$\frac{2\pi}{113.04}=\frac{(2\pi/3)}{x}\\ \\x=113.04*(2\pi/3)/(2\pi)\\ \\x=37.68\ in^{2}$

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3 years ago