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juin [17]
3 years ago
7

What is 9a - 3 (2a - 4) = 15

Mathematics
2 answers:
Mariulka [41]3 years ago
8 0
The answer is a=1

Here's the math:

9a-3(2a-4)=15

9a-6a+12=15-------------------------------Distribute the -3 across the parenthesis

3a+12=15-----------------------------------Combine like terms

3a=3----------------------------------------Subtract 12 from both sides

a=1-------------------------------------------Divide 3 from both sides

Hope this helped!! :))
faltersainse [42]3 years ago
5 0
<span>9a + -3(2a + -4) = 15 Reorder the terms: 9a + -3(-4 + 2a) = 15 9a + (-4 * -3 + 2a * -3) = 15 9a + (12 + -6a) = 15 Reorder the terms: 12 + 9a + -6a = 15 Combine like terms: 9a + -6a = 3a 12 + 3a = 15 Solving 12 + 3a = 15 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 3a = 15 + -12 Combine like terms: 12 + -12 = 0 0 + 3a = 15 + -12 3a = 15 + -12 Combine like terms: 15 + -12 = 3 3a = 3 Divide each side by '3'. a = 1 Simplifying a = 1</span>
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49 more than the quotient of an unknown number and 12 is 53. What is the value of the unknown number?
lara [203]
Unknown = x

the quotient of x and 12 is x/12 than 49 more than that is 53,
(x/12)+49=53, now use basic math and solve

-49 from both side,
x/12=4

*12 to both side,
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4 0
3 years ago
Does the point (7 5) satisfy the equation y = x + -2
masha68 [24]

Answer:

Yes

Step-by-step explanation:

7 = x

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5 = X + - 2

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If X is 7 then

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2 years ago
PLEASE HELP! SEE THE IMAGES BELOW! 30 POINTS
Mkey [24]

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d for the first and c for the second

Step-by-step explanation:

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2. The point where the two lines cross is at (2.5, -6.5)

6 0
3 years ago
Please help, need answer fast!
AleksandrR [38]
The answer is
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Hope it helped : )
3 0
3 years ago
A city is building a fence around a rectangular playground. If the perimeter of the playground is 90 feet and the length of one
Montano1993 [528]
90=l+l+w+w
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The width of the playground is 17.

6 0
3 years ago
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