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Fofino [41]
3 years ago
12

2) -84 = 6(4a – 2) A) {2} C) No solution. B) {1} D) -3)

Mathematics
1 answer:
LenaWriter [7]3 years ago
5 0

In this question, you're solving for a.

Solve for a:

-84 = 6(4a - 2)

<em>Distribute the 6 to the variables inside the parenthesis</em>

-84 = 24a - 12

<em>Add 12 to both sides</em>

-72 = 24a

<em>Divide both sides by 24</em>

-3 = a

This means that answer choice D would be the correct answer.

Answer:

D). -3

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Simplify using distributive property 4(z+2)+2(3-z)
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you multiply

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3 years ago
The length of a rectangle is 2 units more than the width. The area of the rectangle is 63 units. What is the length, in units, o
Keith_Richards [23]

Answer:

Length = 9units

Width = 7units

Step-by-step explanation:

It is said that the length is 2units more than the width

Assume that the width is x, then the length will be 2 + x

ie

Width = x

Length = 2 + x

Area of the rectangle = 63units

Area of rectangle = l * b

l - length of the rectangle

b - width of the rectangle

A = l * b

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63 = ( 2 + x) x

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Let's rearrange it

x^2 + 2x - 63 = 0

Let's find the factor of 63

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Let's use -7 and +9

x^2 - 7x + 9x - 63 = 0

Separate with brackets

( x^2 - 7x) + ( 9x - 63) = 0

x( x - 7) + 9(x - 7) = 0

( x + 9)(x - 7) = 0

( x + 9) = 0

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So therefore,

x = 7

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Width = x

= 7units

7 0
3 years ago
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