What is 4/5 - 1/2? Explain how you got your answer in complete sentences.

1 answer:

4 0

So you start of by makig the denominator the same so you would multiply 2 by 4 to get 8 on the left and then multiply 5 by 1 to get five allowing you multiply 5 by 2 to get a common denominator that means so far we have 8/10 and 5/10 then you would just take them away from each other giving you 3/10

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Tell how you can critique Jason reasoning

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I’m confused on this one

dedylja [7]

It's a parallelogram so if one angle is 90 degrees they all will be because of transverse angles and all that good stuff.

So we're given the diagonal of a rectangle and one side and we're asked to find the other. The diagonal of a rectangle is the hypotenuse of the right triangle whose legs are the sides of the rectangle. So this is a Pythagorean Theorem question in disguise:

$AB^2 + AD^2 = BD^2$

$AD^2 = BD^2 - AB^2$

$AD = \sqrt{ BD^2 - AB^2 }$

$AD = \sqrt{149^2 - 51^2} = \sqrt{19400} = 140$

Answer: 140 cm

I don't recall seeing this Pythagorean Triple before.

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