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3 years ago

What's 36y - 8y + 15 - 13?

Mathematics

2 answers:

Len [333]3 years ago

8 0

The answer is 28y+2. You have to combine a like terms.

Svetach [21]3 years ago

6 0

Answer:

28y + 2

Step-by-step explanation:

You are supposed to subtract all of the y's and subtract 15 and 13

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Solve the system of equations algebraically.

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Answer: D

Step-by-step explanation:

$4x-3y=8\\5x-4y=5$

Let's take one of the equations and solve for a variable to use the substitution method.

$5x-4y=5\\5x=5+4y\\x=\frac{5+4y}{5}$

Now replace this in the first equation.

$4x-3y=8\\4(\frac{5+4y}{5})-3y=8\\\frac{20+16y}{5}-3y=8$

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$\frac{20}{5}+\frac{16y}{5}-3y=8$

Solve 20/5

$4+\frac{16y}{5}-3y=8$

Subtract 4 from both sides to isolate y.

$4-4+\frac{16y}{5}-3y=8-4$

$\frac{16}{5}y-3y=4$

Solve the difference.

$\frac{16-(3)(5)}{5}y=4\\$

$\frac{16-15}{5} y=4$

$\frac{1}{5}y=4$

Multiply by the reciprocal or the inverted fraction that is next to y to isolate it.

$(\frac{5}{1} )(\frac{1}{5})y=4(\frac{5}{1})$

$y=20$

Now, in order to find x, replace y in any of the two equations.

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3 years ago

Two runners one averaging 9 mph and the other averaging 8 mph start the same place and run along the same trail the slower runne

andreev551 [17]

Answer:

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Step-by-step explanation:

15 divided into 8.0

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