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3 years ago

If a = 5, b = 4, and c = 7, find the value for 3(b + a) = c. 10 15 34 20

Mathematics

2 answers:

Debora [2.8K]3 years ago

7 0

Answer:

Step-by-step explanation:

3 (b + a) = c

3 (4 + 5) = 7

12 + 15 = 7

27 = 7

27 - 7

muminat3 years ago

4 0

$\huge\boxed{ \sf{Answer}}$

Given,

$a = 5 \\ b = 4 \\ c = 7$

And the equation we need to solve is,

$3(b + a) = c$

To find the answer, you need to substitute the values of a, b & c in the equation.

$3(b + a) = c \\ 3b + 3a = c \\ ( 3 \times 4) +( 3 \times 5) = 7 \\ 12 + 15 = 7 \\ 12 + 15 - 7 = 0 \\ = 27 - 7 \\ = 20$

↦ The answer is 20.

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3 years ago

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vovangra [49]

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3 years ago

Solve the following system of equations:

Vladimir79 [104]

Answer:

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Step-by-step explanation:

We can solve this by either graphing and finding ther point the lines intersect, or mathematically, I'll do both.

Graphing:

Mathematically:

−2x + 4y = 6

y = 2x + 3

See the attached graph. The lines intersect at (-1,1)

--------------------

I'll rearrange the first equation (to make it easier for me):

−2x + 4y = 6

4y = 2x + 6

y = (1/2)x + 1.5

Now lets substitute the second equation into the first so that we can eliminate y:

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=================

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1 year ago