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3 years ago

Which of the following is not an equivalent expression to -12 - 7x?

Mathematics

2 answers:

Georgia [21]3 years ago

8 0

-7x + 12 is not an equiv. expression because one of the - signs in the original expression has been changed to +.

Anna35 [415]3 years ago

7 0

Answer:

A. -7x+12

Step-by-step explanation:

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3x+30+x=10+2x+5x+2 <br> i need help fast

kupik [55]

Answer:

x=6

Step-by-step explanation:

Group Like Terms:

3x+x+30=10+2x+5x+2

Add similar elements 3x+x=4x:

4x+30=10+2x+5x+2

Add similar elements 2x+5x=7x:

4x+30=10+7x+2

Group like terms:

4x+30=7x+10+2

Add the numbers 10+2=12:

4x+30=7x+12

Subtract 30 from both sides:

4x+30-30=7x+12-30

Simplify:

4x=7x-18

Subtract 7x from both sides:

4x-7x=7x-18-7x

Simplify:

-3x=-18

Divide both sides by -3:

$\frac{-3x}{-3} =\frac{-18}{-3}$

Simplify:

x=6

Hence, the correct answer is 6

4 0

2 years ago

What does 3 (2x - 4) = 8x 14 equal?

jeka57 [31]

6x - 12 = 8x + 14
2x = - 26
x = - 13

5 0

3 years ago

What is the volume of a pyramid that is 15mm , 18mm , 21mm in cubic millimeters

Ugo [173]

Answer:

V=1890mm

Step-by-step explanation:

You must use its formula: which is

V=(Length x height x width) / 3

V=(15x18x21)/3

V=5670/3

V=1890mm

3 0

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48 is 32% of what number?

Irina18 [472]

Answer:

150

Step-by-step explanation:

Because I looked it up

4 0

3 years ago

Pls help its a math question

noname [10]

Answer:

Step-by-step explanation:

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3 years ago

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