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3 years ago

4/5 of a number r is equal to 16.

Mathematics

1 answer:

amm18123 years ago

7 0

Answer:

r=20

Step-by-step explanation:

take the number you have, divide it by the numerator, and multiply it by the denominator, like shown:

4/5 of a number (r) is 16

16/4=4

4*5=20

r=20

ta-da! :P

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Find the solutions of each equation on the interval [0, 2π).

inysia [295]

Answer:

x = 0

Step-by-step explanation:

Given sin(3π/2+x) + sin(3π/2+x) = -2

2sin(3π/2+x) = -2

sin(3π/2+x) = -1

clearly x = 0 on satisfies the above equation

We know that sin(3π/2+x) = - cosx

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4 years ago

20% less than 80 is

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Answer:

Step-by-step explanation:

80*0.2

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3 years ago

Read 2 more answers

Help sos i don’t know how to do this

nekit [7.7K]

9514 1404 393

Answer:

(a) 2

Step-by-step explanation:

Simplify this fraction the same way you would any fraction: cancel common factors from numerator and denominator.

$22x^2y^2\div11x^2y^2=\dfrac{22x^2y^2}{11x^2y^2}=\dfrac{2\cdot11x^2y^2}{11x^2y^2}=2\cdot\dfrac{11x^2y^2}{11x^2y^2} = 2\cdot1 = \boxed{2}$

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3 years ago

Which is the best estimate for the percent equivalent of 7 15?

Talja [164]

The best estimate for the percent equivalent of 7 15 is Approximate 46%.

What is a percentage in math?

Percentage, a relative value indicating hundredth parts of any quantity. One percent (symbolized 1%) is a hundredth part; thus, 100 percent represents the entirety and 200 percent specifies twice the given quantity.
The percentage means, a part per hundred. The word per cent means per 100.
It is represented by the symbol “%”. Examples of percentages are: 10% is equal to 1/10 fraction.

Given : 7/15

To convert a number in to percentage we multiply it by 100.

$\frac{7}{15} = \frac{7}{15} * 100$