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Sati [7]
3 years ago
10

Which methods correctly solve for the variable x in the equation 7 - x =18?​

Mathematics
1 answer:
ollegr [7]3 years ago
7 0
The first and seconds answer would be correct, the other answers do not solve for x explicitly (by itself) or they solve for x incorrectly
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1. A right angled triangle has two shorter sides and one is twice as long as the other. The hypotenuse is 25 cm long. What are t
Semenov [28]

Step-by-step explanation:

The hypotenuse of a right-angled triangle = 25 cm

One side is twice as long as the other.

Let the other side is x.

First side = 2x

Using Pythagoras theorem to find the lengths of the shorter sides.

x^2+(2x)^2=25^2\\\\x^2+4x^2=625\\\\5x^2=625\\\\x^2=125\\\\x=11.18\ cm

So, the other side = 11.18 cm

First side = 2(11.18) = 22.36 cm

So, the lengths of the shorter sides are 11.18 cm and 22.36 cm.

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