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3 years ago

A sick man takes 10 ml of medicine three times a day. How much medicine does he take in 15 days.

Mathematics

1 answer:

Dmitriy789 [7]3 years ago

3 0

Answer:

450 ml

Step-by-step explanation:

10 ml x 3 times = 30 ml

1 days = 30 ml

15 days = 450 ml

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Answer:

$a=3$ and $b=5$ .

Step-by-step explanation:

So I believe the problem is this:

$\frac{2(4x+3)}{x-3}(x+7)}=\frac{a}{x-3}+\frac{b}{x+7}$

where we are asked to find values for $a$ and $b$ such that the equation holds for any $x$ in the equation's domain.

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In other words this will clear the fractions.

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As you can see there was some cancellation.

I'm going to plug in -7 for x because x+7 becomes 0 then.

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Divide both sides by -10:

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Now we have:

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Divide both sides by 10:

$\frac{30}{10}=a$

$3=a$

So $a=3$ and $b=5$ .

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3 years ago

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balandron [24]

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vertex angles are congruent so you can set them equal to each other and solve

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