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IgorLugansk [536]
4 years ago
10

If 8=−3r+7r, then r= [blank] −−−−−−.

Mathematics
1 answer:
Svetllana [295]4 years ago
8 0

Answer:

r = 2

Step-by-step explanation:

8 =  - 3r + 7r \\ 8 = 4r \\ 4r = 8  \\ \\ r =  \frac{8}{4}  \\  \\ r = 2

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HELP TIMED! In the figure, lines a and b are parallel lines. Which of the following statements is true? Select all that apply.
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What is 21x^6y^5 divided by 14x^y^9 will make brainliest lot of points on the line too
Fiesta28 [93]

Answer:

\dfrac{3x^4}{2y^4}

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3 years ago
Keisha, Scott, and Ryan have a total of $101 in their wallets. Keisha has $6 more than Scott. Ryan has 3 times what Scott has. H
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Answer:

Keisha =$25

Scott =$19

Ryan = $57

Step-by-step explanation:

Let the amount each have be represented by A, B and C

Keisha = A

Scott = B

Ryan = C

Keisha , Scott and Ryan have a total of $101.

That’s

A + B + C = $101

Keisha has $6 more than Scott

A = 6 + B

Ryan has 3 times Scott

C = 3B

Substitute 6+B for A and 3B for C in the first equation.

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Subtract 6 from both sides

6 - 6 + 5B = 101 - 6

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B = 95/5

B = 19

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That’s A = 6 + B

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Also, Ryan C has 3 times what Scott B has .

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