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Xelga [282]
3 years ago
6

Choose the correct algebraic equation to represent: the amount decreased by $9 is $42.

Mathematics
2 answers:
Andrews [41]3 years ago
8 0

Answer:

m-9=42

Step-by-step explanation:

I'm pretty sure that m-9=42 is the correct answer because m or the amount is being decreased by 9 as 9 is being subtracted from it.

vichka [17]3 years ago
4 0

m - 9 = 42

42 is our final answer so that should be by itself.

If something is being decreased by 9, that means that we are taking away 9 from something so it should be m - 9.

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3 (6+3n) = 5n + 18 + 3n
amid [387]

Answer:

n = 0

Step-by-step explanation:

Multiply parenthesis by 3 and get:

1.) 18 + 9n = 5n + 18 + 3n

Then cancel the equal terms:

9n = 5n + 3n

Collect like terms:

9n = 8n

Move variable to the left:

9n - 8n = 0

n + 0

Plugin the value of 0 into x:

3 (6 + 3 x 0) = 18

5 x 0 + 3 x 0 + 18 = 18

*If the plugged in value have the same result than the answer is correct because 18 + 18.

4 0
4 years ago
0.35(j + 5) − 5.77 = –2.97<br> What does the j = ?<br> Also explain how you got the answer
Kruka [31]

Answer:

<h2>J = 3</h2>

Step-by-step explanation:

got the answer, attached is drawn

5 0
3 years ago
How many sides does a regular polygon have if the measure of one of it's interior angles is 144?
butalik [34]
Each Interior Angle = 180° - (360 / sides)
144 = 180 - (360 / sides)
(360 / sides) = 36
sides = 360 / 36
sides = 10
It is a decagon.
Source:
http://www.1728.org/polygon.htm


6 0
3 years ago
Write an equation that expresses the following relationship.
Gnesinka [82]

Answer:

p = k(d)/u^2

Step-by-step explanation:

<em>BRAINLIEST, PLEASE!</em>

7 0
3 years ago
3(2x-14) x=15-(-9x-5) solution?
nikklg [1K]

so what you have to do is multiply 3 and 2 and 3 and -14 which ends up being 6x-42x=, then do 15 times -9 and you then do 15 times -5 and that becomes -135x - (-7) then you show it like this= 6x-42x=135x-(-7) the solution would be 36x=-135 divide 36 each side and you get x= 2.28
4 0
3 years ago
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