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3 years ago

18 less than three times a number is twice the number. Define a variable write an equation and solve to find the number.

Mathematics

1 answer:

ycow [4]3 years ago

4 0

Answer:

n = 18

Step-by-step explanation:

N = variable

Equation: 3n - 18 = 2n

Solve:

3n - 18 = 2n

3n = 2n + 18 Add 18 to both sides

3n - 2n = 18 Subtract 2n from both sides

n = 18

Hope this helps,

♥<em>A.W.E.</em><u><em>S.W.A.N.♥</em></u>

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2 years ago

Determine if y varies directly with x. Give the constant of variation, when appropriate. (picture below)

maxonik [38]

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<h3>Variation</h3>

y = k × x

where,

k = constant of proportionality

y = -40

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Learn more about variation:

brainly.com/question/6499629

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1 year ago

What is the value of the expression |a + b| + |c| when a = –3, b = 7, and c = –15?

nikdorinn [45]

We know:
$|a|= \left\{\begin{array}{ccc}a&if\ a \ \textgreater \ 0\\0&if\ a=0\\-a&if\ a \ \textless \ 0\end{array}\right\\\\|2|=2\\|0|=0\\|-3|=3$

$|a+b|+|c|$
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2 years ago