3 years ago

When a number is decreased by 45%, the result is 9. What is the original number to the nearest tenth?

Mathematics

1 answer:

Paul [167]3 years ago

3 0

Answer:

16.4

Step-by-step explanation:

To decrease a number by 45% of its value, you subtract the 45%. To get 45%, you multiply the number by 0.45.

So, if x is the original number, then the equation for this word problem would be x - 0.45x = 9.

To solve, we first subtract 0.45x from x, which is 0.55x. This means that 0.55x is equal to 9. To simplify, we can divide both sides by 0.55. 9/0.55 is 16.36363636..., etc. The nearest tenth would be 0.4, so your answer is 16.4

You might be interested in

three roommates Ava, Ben, and Cora went grocery shopping online. Ava spent three times as much Ben and half as much Cora. If tog

Mamont248 [21]

Answer:

Cora's spend will be = $ 16.66

Step-by-step explanation:

Let y be the amount Ben spent

As Ava spent three times Ben will be 3y and half as much Cora(2y)

so the equation becomes

y + 2y + 3y = 50

6y = 50

y = 50/6

y = 8.33

So Cora's spend will be : 2y = 2(8.33) = 16.66 units currency

Note: if currency is in $

Then Cora's spend will be = $ 16.66

8 0

3 years ago

If the side lengths are

aliina [53]

Answer:

It would be 2 times the old perimeter.

5 0

2 years ago

Find the sum<br> −1/2(7z+4)+15(5z−15)

sattari [20]

Answer: $\frac{143x - 453}{2}$

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

What are ALL the solutions 16x^2-12x=54

nikdorinn [45]

Answer:x=9/4 and x=-3/2

Step-by-step explanation:

4 0

3 years ago

A right triangle with side legs of length 13 and 12 what is the value of x enter your answer in the box

Y_Kistochka [10]

Step-by-step explanation:

$x = \sqrt{ {12}^{2} + {13}^{2} } \\ = \sqrt{ 144 + 169 } \\ = \sqrt{313} \\ = 17.69 \\$

4 0

3 years ago

Read 2 more answers