Mathematics Middle School

Sarah is the oldest out of here four sisters. Her youngest sister is half her age. The 2 other sisters are twin and are 2 years younger than Sarah. When the 4 sisters ages are added up together, the result is 45. If the youngest sister is n years old, than what is n?!?!
Plz asap
Thanks

Answers

Answer 1
Sarah is 14
The twins are 12
The youngest (n) is 7

14+(12+12)+7=45

n=7

Related Questions

    A scuba diver is swimming 15 feet below the water’s surface. The diver swims up slowly at 0.5 feet per second for 4 seconds; and then stops to look at an eel. Finally, the diver swims up for 3 more seconds at 0.4 feet per second. What is the diver’s new depth? Enter your answer in the box.

Answers

11.8 feet.

15 feet -(0.5feet×4)
=15feet-2feet
=13 feet
13feet-(0.4feet×3)
=13feet-1.2feet
=11.8 feet

Answer:

-11.8

Step-by-step explanation:

because the scuba diver was below sea level and the key word is below sea level which is negative

Rolf spent 15 hours last week practicing his saxophone if 3/10 of the time was spent practicing warm-up routines how much time did he spend practicing warm-up routines

Answers

I'll be 150 by multiplying the number and find the answer

Michael bought 0.44 pounds of sliced turkey. What is the value of the digit in the hundreths place

Answers

0.44....the digit in the hundredths place is 4....and since it is in the hundredths place, its value is 4/100 (four-hundredths)
0.44....the digit in the hundredths place is 4....and since it is in the hundredths place, its value is 4/100 (four-hundredths)

math question down below more than one answer

Answers

the third one.

32-9=23
the answr is 23

0.5 is 10 times as great as

Answers

The answer is:  " 0.05 " .
____________________________
Explanation:
____________________________
Take  "0.5" and divide by "10" :

0.5 /10 = 0.05 .
____________________________
.5
because when you do .05 x 10 you get .50

The cost to manufacture x number of chairs can be represented by the function C(x) = 36x. In this context, what does C(x) = 2268 mean?

Answers

C(x) = 2268 means that at $36 per chair, when purchasing 63 chairs it will cost $2,268

An election ballot asks voters to select two city commissioners from a group of four candidates. In how many ways can this be done?

Answers

Let n = 12
Let r = 6
Replace every n! with 12 and every r! with 6 and then do the math.
nCr = 12!/[(12 - 6)!*6!]
nCr = 479001600/(720)(720)
nCr = 479001600/518400
nCr = 924
There are 924 ways or combinations to select 6 city commissioners from a group of 12 candidates

In basketball some baskets worth two points others worth three points.in one game the ratio of three point baskets to three point tries for one team was 5:8 if team scored 60 points from three point baskets,how many three point tries did the team have?

Answers

5 actual baskets made and 8 3-point tries. The ratio is 5:8.
You can make a proportion as follows,
5/8=60/x
5 and 60 are equivalent since both are 3-point tries.
What times 5 will equal 60? 12.
So if you multiply 5*12 you will get 60. And if you multiply 8*12 you will get 96.
X=96.
The team tried 96 three-point baskets.
The team tried 96 three point baskets.

All matter is made of atoms that cannot be divided or destroyed.

True
False

Answers

The statement is TRUE because atoms are the smallest unit of matter.

Hope it helps you:)

One 747-airplane can carry 420 passengers. How many total passengers can three planes carry?

Answers

420•3= 1,260 passengers

r - 6183 = 6766 Please put answer down below.

Answers

R=12,949 i hope this helps and if u need an explanation of how i got it et me know :)

12,949 is the answer to the question

Multiply. 7x3/4 Enter your answer as an improper fraction, in simplified form.

Answers

[tex] \frac{7x3}{4} [/tex]

[tex] \frac{21}{4} [/tex]

The simplified form of fraction 21/4 is 3 4/7.

We have,

To multiply 7 by 3/4, you can multiply the numerator (7) by the numerator (3) and the denominator (4) by the denominator (1):

= 7 x 3 = 21 (numerator)

= 1  x 4 = 4 (denominator)

So, the result is 21/4.

However, we can simplify this improper fraction further.

Since 21 and 4 have a common factor of 7, we can divide both the numerator and denominator by 7:

21 ÷ 7 = 3 (numerator)

4 ÷ 7 = 4/7 (denominator)

Therefore,

The simplified form of fraction 21/4 is 3 4/7.

Learn more about fractions here:

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How do you solve this 2/5c+4-1/5c= -9

Answers

Final answer:

To solve the equation 2/5c + 4 - 1/5c = -9, eliminate the fractions and simplify. Find a common denominator, combine terms, and solve for c. The solution is c = 0.

Explanation:

To solve the equation 2/5c + 4 - 1/5c = -9, we need to eliminate the fractions and simplify the equation.

First, find a common denominator for the fractions, which is 5c:

Multiply the entire equation by 5c:2c + 20c - c = -45c

Combining like terms:

21c = -45cAdd 45c to both sides:21c + 45c = 0

Combine the terms on the left side:

66c = 0;Divide both sides by 66 to solve for c:c = 0

Therefore, the solution to the equation is c = 0.

A triangle has one angle measuring 3x degrees. A second angle measures 2x + 20 degrees and the third angle measures 4x -20 degrees. What is the value of x

Answers

Answer:

20

Step-by-step explanation:

the comment below or above me has everything right except one thing. 4 plus 2 plus 3 equals 9, Not 10. 180 divided by 9 equals 20 and there's your answer

The value of x = 20.

We have the three angles of a triangle.

We have to measure the value of x.

Th sum of all the angles of a triangle is ?

The sum of all the angles of a triangle is 180°.

According to the question, we have -

∠1 = 3x

∠2 = 2x + 20

∠3 = 4x - 20

The sum of all the angles of triangle is 180°. Therefore -

3x + 2x + 20 + 4x - 20 = 180

9x = 180

x =20

Hence, the value of x = 20.

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The expression 0.08x+(x−200) models the final price of a computer with an instant rebate in a state that charges a sales tax. The tax is on the original price.

Which expression represents the amount of tax that is paid on the computer?

x−200

0.08x

1.08x

0.08x−200

Answers

Thank you For Posting This Question And Here Is How To Find The Answer:

X is the Original Cost

8% is the Tax Rate

0.08x is the Amount You Pay In Tax

So the Answer is B!

Help Me on number 12. A - C
Plz

Answers

3(1) = 3
3(2) = 6
3(3) = 9
3(4) = 12
3(5) = 15
3(6) = 18
3(7) = 21
3(8) = 24
3(9) = 27
3(10) = 30

The set of number is in order, and gives you the product of the first ten numbers when multiplied with 3.
yes, for 12,21,30,216 > 10, you will reach them eventually

hope this helps

please enlighten  me on what 3n 7n and 6n is there for, and maybe i can help for those too

Tyler orders a meal that cost $15 if the tax rate is 6.6% how much will the sales tax be on Tyler's Meal?

Answers

Answer:

There would be $ 0.99 sales tax on the meal.

Step-by-step explanation:

Given,

The cost of the meal ordered by him = $15,

sales tax rate percentage = 6.6%,

Thus, the amount of the sales tax = 6.6% of the cost of the meal

= 6.6% of 15

[tex]=\frac{6.6\times 15}{100}[/tex]

[tex]= \frac{99}{100}[/tex]

[tex]= \$ 0.99[/tex]

The sales tax will be $0.99 on Tyler's meal.

One-sixth of a number is four

Answers

4 divided by 1/6

4*6

24

Hope this helps!

What is 24.678 rounded to two decimal places

Answers

It would be 20.000 because you would round down
Salutations!

What is 24.678 rounded to two decimal places?

Rounding off to two decimal place means that you are rounding to the nearest hundredths. For this, you need to check whether the number next to the thousandth place is greater than 5, or lesser than 5, If its greater than 5, you need to round up. If its lesser than 5, you need to round down.

8 is sitting in the thousandth place, therefore, we will be adding+1 to the hundredth place.  

24.678 rounded to two decimal place ≈ [tex]24.68[/tex]

Hope I helped (:

Have a great day!

In the number 8,888.888, how does the 8 in the hundredths place compare to the 8 in the place to its left? A. The 8 in the hundredths place represents of what the 8 to its left represents. B. The 8 in the hundredths place represents of what the 8 to its left represents. C. The 8 in the hundredths place represents 100 times what the 8 to its left represents. D. The 8 in the hundredths place represents 10 times what the 8 to its left represents.

Answers

Final answer:

In the number 8,888.888, the 8 in the hundredths place is one-tenth of the value of the 8 in the tenths place, reflecting the structure of the decimal system where each place to the right of the decimal point is a tenth of the value of the position to its left.

Explanation:

When comparing the 8 in the hundredths place to the 8 in the tenths place (the place to its left), we need to remember that in our decimal numbering system, each place to the left is ten times greater than the place to its right. This is a fundamental property of the powers-of-ten notation, which our counting system is based on.

Therefore, the 8 in the hundredths place is one-tenth the value of the 8 in the tenths place. In other words, each 8 in the decimal part of the number 8,888.888 represents ten times less the value of the 8 to its immediate left. This reflects the structure of the decimal system, where each place to the right of the decimal point represents a fraction of 10 of the position to its left.

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Simplify 6 to the power of negative 3 over 6 to the power of 5.

A. 6 to the power of 8
B. 6 to the power of negative 2
C. 1 over 6 to the power of 8

Answers

1/1679616

decimal form 5.5374180

Kate is allowed to work no more than 20 hours a week. She has already worked 13 hours this week. At most, how many more hours CAN she work? Write an inequality and solve.

Answers

Knowing Kate has worked 13 hours already, we write:
13
Knowing Kate can work no more than 20 hours a week, we write:
20 - 13 = 7
This represents the maximum amount of hours, 7, Kate can work the rest of the week. However, she may work less than 7 hours, we can represent this number with x, and thus we represent it as an inequality like so:
x ≤ 7 hours

The number of hours in a week of Kate should be less than or equal to 20. Then the inequality is x + 13 ≤ 20.

What is inequality?

Inequality is simply a type of equation that does not have an equal sign in it. Inequality is defined as a statement about the relative size as well as is used to compare two statements.

Kate is allowed to work no more than 20 hours a week.

She has already worked 13 hours this week.

Let in this week, the number of hours remaining will be x.

then the inequality equation will be given as

13 + x ≤ 20

More about the inequality link is given below.

https://brainly.com/question/19491153

Is 7/45 a terminting or repeating decimal

Answers

7/45 = 0.155 (with the 5's repeating)....so it is repeating

7/45 is a non-terminating and repeating decimal.

What is a rational number?

A rational number is a number that can be written in the form of p/q where q is not equal to zero.

Example:

1/2 is a rational number because it is terminating.

19/3 is a rational number because it is non-terminating and recurring.

We have,

7/45

= 0.155555555555

This means,

It is non-terminating.

It is a repeating decimal.

Thus,

7/45 is a non-terminating and repeating decimal.

Learn more about rational numbers here:

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Solve sx+tx=r for x.

Answers

sx+tx=r
x(s+t)=r
x=r/(s+t)
Factor x out of sx +tx
x (s+t) = r
Divide each term by s+t and simplify.

x = r / (s+t)

Need help with number 4

Answers

I cannot tell which problem is number 4 and you also cannot read the entire problems.

Carl Drove the following distance for the XYZ delivery company from January through July 914, 740, 815, 550, 815, 1250, 740 what was the means distance miles

Answers

832 miles is the overall mean

add all the numbers together and then divide by how many numbers there are

914+740+815+550+815+1250+740 = 5824
5824/7 = 832

hope this helped

Karen currently has an account balance of $7,062.25. She opened the account 17 years ago with a deposit of $2,640.95. If the interest compounds monthly, what is the interest rate on the account?

Answers

The interest rate is 0.4833333%

What is the measure of angle B in the triangle?

This triangle is not drawn to scale.

Enter your answer in the box.

m∠B=
°




A triangle labeled ABC with the angles A forty degrees, angle B parenthesis two x minus thirty parenthesis degree, angle C parenthesis x plus twenty parenthesis degrees


Answers

the interior angles of a triangle add up to 180 degrees

40 + 2x - 30 + x + 20 = 180
3x + 30 = 180
3x = 180 - 30
3x = 150
x = 150/3
x = 50

< A = 40
< B = 2x - 30.....2(50) - 30 = 70 <===
< C = x + 20......50 + 20 = 70

Answer:that answer to the test is 70


Step-by-step explanation:


How many different 12-member juries can be chosen from a pool of 45 people

Answers

Here is a walk through, using the Combination formula.

Round 4,589 to the thousands

Answers

That would be 5,000.


5,000 is the answer to your question
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