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Anna71 [15]
3 years ago
12

Please help. I will give brainliest. ​

Mathematics
2 answers:
Katen [24]3 years ago
5 0

Answer:

x = 77, y = 42

Step-by-step explanation:

y + 31 = 73 via parallel, y = 42

x + y + 61 = 180 via triangle angle sum, x = 77

Firdavs [7]3 years ago
4 0

Answer:

y=42

x=77

Step-by-step explanation:

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Melanie: 15 years old

Kevin: 5 years old

Assume Kevin's present age is x.

That means that 3 years ago, his age would be x - 3.

Melanie's age would be 6(x - 3).

Same thing for 5 years into the future:

Kevin's age would be x + 5.

Melanie's age would be 2(x + 5).

The two equations we have here are:

\left \{ {{x + 5 = 2(x + 5)} \atop {x - 3 = 6(x - 3)}} \right.

By subtracting both equations, we are simplified to:

8 = -4x + 28

By solving the equation, we get x = 5.

That means that Kevin's current age is 5 years old.

Melanie's age could be calculated by substituting Kevins'.

6(x - 3) --> 6(5 - 3) --> 12

Since that was 3 years ago, you need to add 3 to 12 to get her current age.

12 + 3 = 15

Melanie's current age is 15 years old.

3 0
2 years ago
At John Dean High School, 42
son4ous [18]
C.48

110 students
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While driving to a work site, Ross realized he was almost out of gas, so he stopped at a gas station to fill up his truck. The t
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Fudgin [204]

Answer:

min f(x) = 3.95  (for x= 2.5)

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2 years ago
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