One fifth of r is 45

Mathematics

2 answers:

photoshop1234 [79]4 years ago

8 0

Is 9 because when you divide 5 into 45 you get 9

Annette [7]4 years ago

4 0

$\frac{1}{5}r=45 \\ \\ r=45*5= 225$

<span>Just multiply both sides by 5</span>

You might be interested in

28 children will attend the birthday party if each child gets 2 party favors and there are 14 favors in each box how many boxes

dezoksy [38]

Hello!

So if each box has 14 favors, what we need to do is add until we have enough, or more than enough for each of the children that will be at the party to get two of them.

So to start, 14+14=28. There are 28 children going, but each child must have two favors, not one. So, we simply add on two more boxes. 28+14=42, 42+14=56. So, we need 56 favors for each child to get two.

You could multiply to make this problem faster, but adding works out easier in my head. Sorry to drag it out!

So to make it simple, you need four boxes of favors for each child to get two.

Hope this helps, have an awesome day!

3 0

3 years ago

I don’t understand this

tatyana61 [14]

9514 1404 393

Answer:

f⁻¹(x) = √((3 -x)/3)

Step-by-step explanation:

A function gives you a y-value for each value of x.

y = f(x)

An inverse function tells you the x value that produced a given y-value. It is the solution to the equation ...

x = f(y)

So, we want to find y for ...

x = -3y² +3

x -3 = -3y² . . . . . . . . . . . subtract 3

(x -3)/-3 = y² . . . . . . . . . divide by -3

√((x -3)/-3) = y . . . . . . . take the square root.

The requirement for x > 0 in the original function means y > 0 for the inverse function. That is why we use the positive square root.

This can be simplified a little bit to remove the minus sign from the denominator.

f⁻¹(x) = √((3 -x)/3)

The graph plots the function and its inverse. They are reflections of each other over the line y=x. (That's one way you can tell you have the correct inverse function.)