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3 years ago

Please answer Question 20

Mathematics

1 answer:

Sladkaya [172]3 years ago

8 0

Answer:

Perimeter = 20m

Area = 25m

If you want a good explanation please comment on this, I am at middle school and I have to go.

Step-by-step explanation:

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ki77a [65]

Answer:

10 ft

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

let h be hypotenuse, then

h² = 6² + 8² = 36 + 64 = 100 ( take the square root of both sides )

h = $\sqrt{100}$ = 10

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Drupady [299]

Answer:

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Step-by-step explanation:

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3 years ago

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mixas84 [53]

12/2+4-2*3

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What number must be added to the expression below to complete the<br> square?<br> x² - 18x

kiruha [24]

Answer:

$\boxed {\boxed {\sf 81}}$

Step-by-step explanation:

The standard form of a quadratic is:

$ax^2+bx+c$

To complete the square, the a (leading coefficient) must be 1 and there can only be terms with variables on one side.

The expression given:

$x^2-18x$

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This is the number that is added.

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3 years ago