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3 years ago

Find the value of each expression when a=-2 b=-3 and c=5 5a-(4b+6c)=?

Mathematics

2 answers:

Zepler [3.9K]3 years ago

7 0

-10(-12+30)
-10 multiplied by 18
-180

Ugo [173]3 years ago

6 0

5a-(4b+6c)=
5(-2)-(4(-3)+6(5))=
-10-(-12+30)=
-10-(18)=
-10-18=
-28

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Dmitrij [34]

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2 years ago

The cost (c) to hire a dog trainer is varies directly with the amount of time (h) in hours spent training the dog.

NNADVOKAT [17]

Answer:

Part A) The proportional equation is $c=55h$

Part B) 8 hours of training

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

Let

c -----> the cost to hire a dog

h ----> the amount of time in hours

The linear equation is equal to

$c=kh$

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Find the value of k (constant of proportionality)

$k=y/x$

substitute the values

$k=660/12=55$

therefore

The linear equation is

$c=55h$

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2 years ago

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so plug these in to get $\frac{24}{216} =\frac{64}{actual perimeter}$

rearrange to get $actual perimeter = \frac{216 * 64}{24}$

and solve to get 576 inches or 576/12 = 48 feet

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