3 years ago

How can you solve problems involving percents

1 answer:

6 0

You could set up a proportion. For example, what is 20% of 40
is %
--- = ----
of 100
is/40=20/100=1/5
5*8=40
8 would be the answer.

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Answer:

jacob ironed 100 shirts

ayden ironed 280 shirts

Step-by-step explanation:

jacob ironed for 4 hours and ayden for 8 hours

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3 years ago

ANSWER IF YOU KNOW THE ANSWER!!! I WILL GIVE BRAINLIEST BTW!!!!!!!!!!!!!

AURORKA [14]

im pretty sure its c

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2 years ago

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Someone please help. i will mark as brainliest if right :)

DIA [1.3K]

Answer:

The other factor is 5x-2

Step-by-step explanation:

Using the factorisation method:

Two numbers that multiply to give -10 and add to give +3:

+5 and -2

$5x^{2} +5x-2x-2$

$5x(x+1) -2(x+1)$

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So the other factor is 5x-2

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2 years ago

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3 years ago

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Given f(x)=-1/7√16-x^2 find f^-1(x)

Vera_Pavlovna [14]

Answer:

$f^{-1}(x)=\pm \sqrt{49x^2-16}$

Not a function.

Step-by-step explanation:

The given function is;

$f(x)=-\frac{1}{7}\sqrt{16-x^2}$

Let $y=-\frac{1}{7}\sqrt{16-x^2}$

Interchange x and y;

$x=-\frac{1}{7}\sqrt{16-y^2}$

Solve for y;

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Square both sides

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$49x^2^2-16=y^2$

$y=\pm \sqrt{49x^2-16}$

The inverse is

$f^{-1}(x)=\pm \sqrt{49x^2-16}$

$f^{-1}(x)=\pm \sqrt{49x^2-16}$ is not a function because one x-value maps onto to different y-values.

6 0

3 years ago