3 years ago

Confused on my sons math homework. We are subtracting three digit numbers. Please help.

Mathematics

1 answer:

Mumz [18]3 years ago

7 0

Answer:

863-7=856, 870-30=840, 900-55=845

Step-by-step explanation:

I think this may be the answer that is if you are to change the equations to subtraction problems, I can't see the picture so it's hard to answer.

Have a great day!

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Calculate the area of triangle ABC with altitude, CD, given

defon

Answer:

37.5 square units

Step-by-step explanation:

Given:

A(-6,-4), B(6,5), C(-1,6), and D(2, 2), where CD is the altitude if ∆ABC

Required:

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SOLUTION:

Area of a ∆ABC =½*AB*CD

✍️ $AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} = \sqrt{6 -(-6))^2 + (5 -(-4))^2$

$AB = \sqrt{12^2 + 9^2}$

$AB = \sqrt{144 + 81}$

$AB = \sqrt{225} = 15$

✍️ $CD = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} = \sqrt{2 -(-1))^2 + (2 - 6)^2$

$CD = \sqrt{(3)^2 + (-4)^2}$

$CD = \sqrt{9 + 16}$

$CD = \sqrt{25} = 5$

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= ½*15*5

✅ Area = 37.5 square units

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