1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lady_Fox [76]
3 years ago
7

15 is 20% of what number? Steps please

Mathematics
1 answer:
liubo4ka [24]3 years ago
7 0

Answer:

75

Step-by-step explanation:

Translate the problem into an equation and solve the equation.

"15 is 20% of a number"

15 = 20% * n

15 = 20/100 * n

15 = 0.2n

Multiply both sides by 5.

75 = n

Answer: The number is 75.

Check: 20% of 75 = 0.2 * 75 = 15

The answer is correct.

You might be interested in
Determine if the sequence is geometric. If it is, find the common ratio. ( -4, 12, -36, 108, ... )
Naya [18.7K]

Step-by-step explanation:

to know whether it is geometric progression or not, you need to find the common ratio. to find the ratio divide the (n+1)th term by n th term

so, 12/-4 = -3

also, -36/12 = -3

here u see the ratio is always same, i.e., common ratio.

thus u can say it is a geometric series with common ratio -3

5 0
3 years ago
How do you multiply 45 times 52
ser-zykov [4K]
Put in the calculator 45x52
7 0
4 years ago
Read 2 more answers
in a given year, the rate of flu infection for the general public was 8.3%. And sample of 200 people who receive the flu vaccine
makkiz [27]

Answer:

\fbox{\begin{minipage}{10em}Option A is correct\end{minipage}}

Step-by-step explanation:

<em>Step 1: Define significance level</em>

In this hypothesis testing problem, significance levels α is selected: 0.05, the associated z-value from Laplace table:

Φ(z) = α - 0.5 = 0.05 - 0.5 = -0.45

=> z = -1.645

<em>Step 2: Define null hypothesis (</em>H_{0}<em>) and alternative hypothesis (</em>H_{1}<em>)</em>

H_{0} : rate of flu infection p = 8.3% or 8.3/100 = 0.083

H_{1} : rate of flu infection p < 8.3% or 8.3/100 = 0.083

<em>Step 3: Apply the formula to check test statistic:</em>

K = \frac{f - p}{\sqrt{p(1 - p)} } * \sqrt{n}

with f is actual sampling percent, p is rate of flu infection of H_{0}, n is number of samples.

The null hypothesis will be rejected if K < z

<em>Step 4: Calculate the value of K and compare with </em>z

K = \frac{(\frac{3.5}{100})  - 0.083}{\sqrt{0.083(1 - 0.083)} } * \sqrt{200} = -2.46  

We have -2.46 < -1.645

=>This is good evidence to reject null hypothesis.

=> The actual rate is lower. (As H_{1} states)

Hope this helps!

:)

5 0
3 years ago
What are the zeros of (x-2)(x^2-9)
SashulF [63]
So because the factors of the equation are (x-2), (x+3) and (x-3), you set them equal to zero and you get x=2, -3, and 3
4 0
3 years ago
Read 2 more answers
Ethan's taxable income is $87,525. Use this tax schedule to calculate the total amount he owes in taxes.
Reptile [31]
$18,617.75 is the answer
$87,525-$77,100=$10,425 (the amount over $77,100)
$10,425 x .28=$2,919 (the 28% taxed amount over $77,100)
$2,919+$15,698.75 (the already taxed amount in the chart)=$18,617.75



8 0
3 years ago
Other questions:
  • Since 2006​, the amount of money spent at restaurants in a certain country has increased at a rate of 4​% each year. In 2006​, a
    5·2 answers
  • Use distributive property to find the sum of 6×89 show work
    15·1 answer
  • Is this correct ???? please help
    12·1 answer
  • In 2018 the state of Arizona has a population of 7,123,898 this is an increase from 2010 when a population of 6,392,017 if the a
    9·1 answer
  • The width of a rectangle is one more than twice its length. If the rectangle's perimeter is 44 cm, then its length is ____ cm.
    11·1 answer
  • 4(9-3)*(8-2) using gema and operations
    10·1 answer
  • What is the independent variable of y=3.5x+2.8
    5·2 answers
  • Pls help I need a good grade
    9·2 answers
  • If n is parallel to m, which of the following statements are true? Select all that apply.
    6·1 answer
  • Negative 10 over 7 minus one over seventy
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!