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3 years ago

Melissa earns

Mathematics

1 answer:

attashe74 [19]3 years ago

6 0

Answer:

$75

Step-by-step explanation:

let the amount melissa earn be X

and we know that Bret also earns X

than

Breanna earns = X+20

X+X+X+20 = 245

3X +20=245

3X= 245-20

3X= 225

X= 75

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Plot the points A(9, 11) and B(–3, –5). Find midpoint M of AB. Then show that AM = MB and AM + MB =AB

Alex_Xolod [135]

Answer:

The midpoint is (3, 3).

Step-by-step explanation:

We are given the two points A(9, 11) and B(-3, -5).

The midpoint is given by:

$\displaystyle M=\Big(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\Big)$

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We want to show that AM = MB.

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The distance between A(9, 11) and M(3, 3) will then be:

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And the distance between B(-3, -5) and M(3, 3) will be:

$MB = \sqrt{ (3-(-3))^2 + (3-(-5))^2 } = \sqrt{(6)^2+(8)^2} = \sqrt{ 100 } = 10$

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