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3 years ago

Can y'all please help.

Mathematics

1 answer:

sattari [20]3 years ago

6 0

Answer:

See explanation

Step-by-step explanation:

<u>Step 1.</u> Substitute for d to solve for n:

From the first equation:

$d=70-n$

Then substitute it into the second equation:

$0.1(70-n)+0.05n=5.5\\ \\7-0.1n+0.05n=5.5\\ \\7+(-0.05n)=5.5\\ \\-0.05n=5.5-7=-1.5\\ \\n=\dfrac{-1.5}{-0.05}=30$

<u>Step 2:</u> Substitute for n to solve for d:

$d+n=70\\ \\d+30=70\\ \\d=70-30=40$

There are 40 dimes and 30 nikels in the piggy bank

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Answer:

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<h2>Steps:</h2>

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3 years ago

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Answer:

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Step-by-step explanation:

The sum of segments is used:

EF +FG = EG

3x +(5x +16) = 11x -2 . . . . substitute given expressions

8x +18 = 11x . . . . . . . . add 2

18 = 3x . . . . . . . . subtract 8x

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The value of the variable is 6.

<em>Check</em>

The segment lengths are ...

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