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Zigmanuir [339]
2 years ago
9

I WILL GIVE BRAINLIEST!!!

Mathematics
1 answer:
Elodia [21]2 years ago
8 0

Answer:

Which of the following questions allows for variability?

How many students visited the nurse on Monday, September 15, 2014, at your school?

How many free throws can a person make in one minute?

How much money do doctors earn per year?

How tall are the players on the Harlem Globetrotters?

Step-by-step explanation:

HELP

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The smiths have two children. The sum of their ages is 23. The produce of their ages is 132. How old are the children?
kolezko [41]

For this case we propose a system of equations:

x: Let the variable representing the age of the first child of the Smiths

y: Let the variable representing the age of the second child of the Smiths

According to the data of the statement we have to:

x + y = 23\\x * y = 132

From the first equation we have to:

x = 23-y

We substitute in the second equation:

(23-y) * y = 132\\23y-y ^ 2 = 132\\y ^ 2-23y + 132 = 0

We find the solutions by factoring:

We look for two numbers that, when multiplied, result in 132 and when added, result in 23. These numbers are 11 and 12.

Thus, we have that the factorized equation is:

(y-11) (y-12) = 0

Thus, the solutions are:y_ {1} = 11\\y_ {2} = 12

So, we can take any of the solutions:

With y = 11

Thenx = 23-11 = 12

Therefore, the ages of the children are 11 and 12 respectively.

Answer:

 The ages of the children are 11 and 12 respectively.

6 0
3 years ago
9) 80 is 20% of what number?
sweet-ann [11.9K]
<h3><u>Answer:</u></h3>
  • 400 is the number.
<h3><u>Step-by-step explanation:</u></h3>

<em>There can be many ways to find the number.</em><em> I have found the number with the help of fractions and multiplication. </em><em>Below is the solution to your problem.</em>

  • 80 = 20/100
  • => 5 x 80 = 20 x 5/100
  • => 400
<h3><u>Conclusion:</u></h3>

<em>Hence, 80 is 20% of 400. </em><em>I hope my method helped you.</em>

BrainiacUser1357

8 0
2 years ago
Read 2 more answers
If a bottle rotates through 270 degrees in 3 seconds how many degrees does it rotate in 2 seconds
abruzzese [7]
The bottle rotates 180 degrees in 2 seconds.

I divided 270 by 3, which was 90. Then, I multiplied 90 by 2. Which was 180.<span />
7 0
3 years ago
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I need help
Thepotemich [5.8K]
I hope this helps you

3 0
3 years ago
Find the area of an equilateral triangle whose value is 18 cm​
rusak2 [61]

Answer:

18 + 18 + 18 = 18 \times 3 = 54

Step-by-step explanation:

I ain't sure but it might help you out:D

3 0
3 years ago
Read 2 more answers
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