All categories

3 years ago

When a number is decreased by 20% of itself, the result is 128. what is the number?

1 answer:

4 0

The number was 160 because 5/4•128=160. 5/4 represents inverting 80% and multiplying it by the number to determine how the result became 128. For checking over all you have to do is do 4/5 or 80%•160 which shall give you 128.

You might be interested in

Consider the overall effects on Floral Scent Cleaning Service from selling and performing services on account for $ 8 comma 780

Ne4ueva [31]

Answer:

Net income: $4,260.

Step-by-step explanation:

We have been given that consider the overall effects on Floral Scent Cleaning Service from selling and performing services on account for $ 8,780 and paying expenses totaling $ 4,520.

$\text{Net income}=\text{Total revenues}-\text{Total expenses}$

$\text{Net income}=\$8,780-\$4,520$

$\text{Net income}=\$4,260$

Since the selling and performing services on account are greater than total expenses, therefore, Floral Scent Cleaning Service's net income is $4,260.

7 0

4 years ago

Consider the following hypothesis test. H0: μ = 15 Ha: μ ≠ 15 A sample of 50 provided a sample mean of 14.11. The population sta

bearhunter [10]

Answer: -2.10

Step-by-step explanation:

Given : $H_0:\mu=15$

$H_a:\mu\neq15$

Sample size : n= 50, since the sample size is greater than 30 , so we apply z-test.

Sample mean : $\overline{x}=14.11$

Standard deviation : $\sigma= 3$

The test statistic for population mean :-

$z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

i.e. $z=\dfrac{14.11-15}{\dfrac{3}{\sqrt{50}}}=-2.09775011752\approx-2.10$

Hence, the value of the test statistic = -2.10

8 0

4 years ago

Given the point and its image, determine the scale factor.

BARSIC [14]

Answer:

it would be 2

Step-by-step explanation:

8 0

3 years ago

A discount of 16% saved Jackie $38 on office supplies. What was the price of the supplies before the discount?

zloy xaker [14]

16 % = 38

(16 × 6 = 96

16 / 4 = 4 so = 38/4 = 9.5)

100% = 38*5 + 9.5

=199.5

3 0

3 years ago

A rectangle has an area of 24 square centimeters. The width of the rectangle is 3 centimeters. What is the length of the rectang

Luden [163]

Answer:

The answer is 8.

Step-by-step explanation:

Area = Length times width. Since division and multiplcation are inverse operations, we can do 24 divided by 3 to get 8, so to get the area of 24, you would do 8 x 3.

7 0

4 years ago