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3 years ago

What number is 50% out of 800??

Mathematics

2 answers:

katen-ka-za [31]3 years ago

6 0

50% of 800 is 400.

50% = 0.50

800 * 0.50 = 400

Morgarella [4.7K]3 years ago

4 0

400 since 50% is half

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Answer:

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Step-by-step explanation:

If u multiply both sides of the ratio by the same number, u get an equivalent ratio. By multiplying 9:11 by 3 on both sides, you get 27:33. The difference refers to subtraction. 33-27= 6 which is the difference between the two numbers.

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Your answer is:

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Step-by-step explanation:

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4 years ago

If sinA =3/5 and A+B =90 find cosB

-Dominant- [34]

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$Used:\\\\\cos(x+y)=\cos x\cos y+\sin x\sin y\\\\\cos90^o=0,\ sin90^o=1$

Other method:

Look at the picture.

$\sin\theta=\dfrac{opposite}{hypotenuse}\\\\\sin A=\dfrac{3}{5}\to opposite=3\ and\ hypotenuse=5$

$\cos\theta=\dfrac{adjacent}{hypotenuse}\\\\adjacent=3\ and\ hypotenuse=5\to\cos B=\dfrac{3}{5}$

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3 years ago