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2 years ago

Let f(r) = 42 - 5, find f(3).

Mathematics

1 answer:

liberstina [14]2 years ago

5 0

F (x) = 4x - 5
F (3) just means substituting x with 3
For further please ask in question

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Y=-4x-7, x+y=2 please help rn

Mashcka [7]

Use substitution
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Y = -4(-3) - 7
Y = 12 - 7, y = 5
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3 years ago

10$ is spent on 2 big pails and 1 small one. A smail pail cosf half as much as each big one. How much is spent on a big pail? Ho

Mila [183]

Answer:

$4 is spent on a big pail and $2 is spent on a small pail.

Step-by-step explanation:

Given:

10$ is spent on 2 big pails and 1 small one.

A small pail cost half as much as each big one.

Now, to find the amount spent on a big pail and on a small pail.

Let the cost of a big pail be $x.$

And the cost of small pail be $\frac{x}{2} .$

As given, there are 2 big pails.

And the total money spent = $10.

According to question:

$(x+x)+\frac{x}{2}=10$

$2x +\frac{x}{2}=10$

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Multiplying both sides by 2 we get:

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Dividing both sides by 5 we get:

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The cost of a big pail = $4.

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