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
4vir4ik [10]
3 years ago
13

When I add 45 to a certain number and divide the sum by 2, the result is the same as 5 times the number. What is the number?​

Mathematics
2 answers:
natali 33 [55]3 years ago
8 0

Answer:

9

please mark brainliest

valkas [14]3 years ago
3 0

Answer:

<u><em>9</em></u>

Step-by-step explanation:

When we divide 45 by 2 which is 9, it is 5 times the number.

You might be interested in
I dont kniw and didnt know how to take down a question
stiv31 [10]
I don’t think you can take down a question on Brainily but thanks for the 5 points
have a wonderful day!!!!!
3 0
2 years ago
If you want to be 95​% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard
Aleksandr [31]

Answer:

The sample size required is at least 171

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

What sample size is​ required?

A samle size of at least n is required, in which n is found when M = 3, \sigma = 20

So

M = z*\frac{\sigma}{\sqrt{n}}

3 = 1.96*\frac{20}{\sqrt{n}}

3\sqrt{n} = 20*1.96

\sqrt{n} = \frac{20*1.96}{3}

(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}

n = 170.7

Rouding up

The sample size required is at least 171

5 0
3 years ago
30 POINTS!
Goshia [24]

Answer:

The correct answare would be 3.54 x 10^22 N  

7 0
2 years ago
Thomas received a $50 gift card for an online store, and he wants to buy LED lights to decorate his bedroom. If one strand
olga nikolaevna [1]

Answer:

Thomas can buy 4 strands.

Step-by-step explanation:

We need to round $11.86 to the nearest dollar, which is $12.

Now we ask ourselves, "how many times does 12 go into 50 without going over?"

12 × 4 = 48

12 can go into 50 4 times.

8 0
3 years ago
Read 2 more answers
Ik what it is just helping out others 1+1
antiseptic1488 [7]

The question is asking what will we get if we add 1+1.

Let us use an example to understand this.

Example:

Suppose Amy has 1 ice cream and her brother Ruth has also got one ice cream.

Now if they both finished their ice creams, how many total ice creams were finished.

So we see that 1 and 1 add up to give two ice creams and so two ice creams are finished by them both.

Applying this to our question adding 1 and 1 gives us 2.

Answer : 1+1 =2

3 0
3 years ago
Read 2 more answers
Other questions:
  • Emma needs 2 pounds of ground meat to make a meatloaf.she has one package with 2.09 pounds of ground meat and another with 2.09
    9·1 answer
  • Which expression is equivalent to −4.6+(−0.4)+(−7.2) ? (4.6+0.4+7.2) −4.6−(0.4+7.2) (4.6+0.4)+(−7.2) −(4.6−0.4)+(−7.2)
    5·1 answer
  • What is the value of 28% of 95?
    10·1 answer
  • ABCD is a parallelogram. Find the measure of angle , (Give reason)
    9·2 answers
  • Formulate a system of equations to represent this situation, with f = the amount of money that Frank spent and r = the amount of
    10·1 answer
  • 1. Using the right triangle above, fill in the correct ratios for each trigonometric function. (do not simplify)
    9·1 answer
  • Can Someone please help me !!! ( you have to fill out the blanks )
    7·1 answer
  • Pls i need help plsssss
    9·2 answers
  • The compound interest on a certain sum of money for 2 years is $208 and the simple interest for the same time at the same rate i
    11·1 answer
  • A farmer wants to increase the size of one of his square pens. The pen measures 10 feet on each side. The farmer plans to increa
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!