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Annette [7]
3 years ago
5

What does r equal if -3(2r + 7) = 3

Mathematics
2 answers:
exis [7]3 years ago
7 0

Answer:

r = -4

Step-by-step explanation:

2r + 7 = - 1

2r = - 1 - 7

2r = - 8

Alina [70]3 years ago
5 0

Answer: r=-4

Step-by-step explanation: -3(2r + 7)=3                                                             (−3)(2r)+(−3)(7)=3                                                                                                   −6r+−21=3                                                                                                             −6r−21+21=3+21                                                                                                   -6r/-6=24/-6                                                                                                         r=-4              

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Carlos is 33 years younger than Kristen. 2 years ago, Kristen's age was 2 times Carlos's age. How old is Carlos now?
ale4655 [162]

Answer:

Carlos is 35 years old now

Step-by-step explanation:

Assume that Carlos is x years old now

∵ Carlos is x years old now

∵ Carlos is 33 years younger than Kristen

- Kirsten's age is the sum of x and 33

∴ Kirsten is x + 33 years old now

2 years ago

∵ Carlos's age = x - 2

∵ Kristen's age = x + 33 - 2 = x + 31

∵ Kristen's age was 2 times Carlos's age

- Equate Kristen's age by 2 times Carlos's age

∴ x + 31 = 2(x - 2)

- Simplify the right hand side

∴ x + 31 = 2x - 4

- Subtract x from both sides

∴ 31 = x - 4

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∴ 35 = x

∵ x represents Carlos's age now

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3 years ago
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As shown in the diagram of the right triangles below, Triangle: ABC ~ Triangle: DEF, AB = 7x, BC = 4, DE = 7, EF = x. What is th
charle [14.2K]

since triangles are similar

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The equation you seek is
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7 0
3 years ago
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