The mean age of several boys in a class is 12. The total is 156. How
many boys are there?

Answers

Answer 1

Answer:

13

Step-by-step explanation:

156/12

Answer 2
So to get the answer we would divide 156 by 12 as it’s the mean which would give us 13

Related Questions

PLS HELP I WILL MARK BRAINLIEST SINCE YOIR WRITING FOR ME

Answers

The answer is -0.5
if you add 0.5 to -0.5 you will get 0
if you add 1.5 to -1.5 you will get 0
thus 0.5 is the answer due to it needing a lesser value to be added to obtain the value 0

Answer:

-0.5. -0.5 is to the right of -1.5

SECTION 2-4 PRACTICE

For problems 3–7 use the Social Security tax rate of 6.2 percent and Medicare

tax rate of 1.45 percent to determine each tax and the total deduction.

Gross Soc. Sec. Tax Medicare Tax

Total

Pay

Withheld

Withheld

Deduction

3.

a.

C!

b.

b.

а.

C.

4.

5.

$ 125.00

432.00

241.00

1,562.00

2,521.00

a.

b.

C.

a.

b.

c.

6.

7.

b.

C.

a.

US 4

Answers

Answer:

Computation of each tax and the total deduction:

                Gross     Soc. Sec. Tax    Medicare         Total

                                                             Tax             Deduction

a.           $ 125.00         $7.75              $1.81               $9.56

b.             432.00         26.78               6.26               33.04

c.             241.00           14.94               3.49                18.43

d.         1,562.00          96.84             22.65              119.49

e.         2,521.00       156.30             36.55              192.85

Step-by-step explanation:

a) Data and Calculations:

Social Security tax rate = 6.2%

Medicare tax rate = 1.45%

Computation of each tax and the total deduction:

                Gross     Soc. Sec. Tax    Medicare         Total                Pay

                                                             Tax             Deduction

a.           $ 125.00         $7.75              $1.81               $9.56             $115.44

b.             432.00         26.78               6.26               33.04             398.96

c.             241.00           14.94               3.49                18.43             222.57

d.         1,562.00          96.84             22.65              119.49           1,442.51

e.         2,521.00       156.30             36.55              192.85          2,328.15

Total $4,881.00       302.61              70.76             373.37          4,507.63

Six 2-foot tall pine tress were planted during the school's observation of Earth Awareness Week in 1990. The trees have grown at an average rate of 3/4 foot per year. What Linear equation in y=mx+b y=mx+b form gives the height of the tree in terms of number of years since they were planted?

Answers

Answer:

The linear equation that gives the height of the tree in terms of number of years since they were planted is y = 3/4x + 2  OR y = 0.75x + 2

Step-by-step explanation:

In the linear equation, y =mx + b

This is the equation of a straight line where m is the gradient and b is the intercept on the y-axis.

In the equation, y represents the height of the trees after x years.

m is the gradient, that is, the rate at which the trees are growing.

and b is the height at the time they were planted, that is, at time x = 0.

From the question,

Six 2-foot tall pine trees were planted during the school's observation of Earth Awareness Week in 1990, that is,

b = 2

Also, from the question,

The trees have grown at an average rate of 3/4 foot per year, that is,

m = 3/4

Hence, the equation becomes

y = 3/4x + 2  ([tex]y = \frac{3}{4}x + 2[/tex])

OR

y = 0.75x + 2

Hence, the linear equation that gives the height of the tree in terms of number of years since they were planted is y = 3/4x + 2  OR y = 0.75x + 2.

Equation that represents the height of the tree in terms of number of years since they were planted

[tex]y=\frac{3}{4}x+2[/tex]

Given :

Six 2-foot tall pine tress were planted.

The trees have grown at an average rate of 3/4 foot per year.

We need to frame linear equation that represents the height of the tree in terms of number of years.

Linear equation is y=mx+b

where b is the initial height of the tree

m is the rate of growth of the tree

y is the final height of the tree

and x  represents the number of years

Initial height of the tree is 2 foot

rate of growth is 3/4 foot per year

x is the number of years

Replace all the values inside y=mx+b formula

[tex]y=\frac{3}{4}x+2[/tex]

Equation that represents the height of the tree in terms of number of years since they were planted

[tex]y=\frac{3}{4}x+2[/tex]

Learn more : brainly.com/question/20816424

Mr. and Mrs. Sanchez hope to send their daughter to college in fourteen years. How much money should they invest now at an interest rate of 9.5% per year, compounded continuously, in order to be able to contribute $9500 to her education?

Answers

Answer:

Principle (P) = $2,512.56 (Approx)

Step-by-step explanation:

Given:

Interest annually (R) = 9.5% = 0.095

Amount need (A) = $9500

Time period (T) = 14 years

Find:

Principle (P)

Computation:

A = P[e^(R*T)]

9,500 = P[e^(0.095 x 14)]

9,500 = P[3.781]

P = 9,500 / 3.781

Principle (P) = $2,512.56 (Approx)

Mr. and Mrs. Sanchez need to invest $2666 for 14 years in order to be able to contribute $9500 to her education.

A compound interest is given by the formula:

[tex]A=P(1+\frac{r}{n} )^{nt}[/tex]

Where A is the final amount, r is the rate, t is the period, P is the principal and n is the number of times compounded in a period.

Given that A = 9500, r = 9.5% = 0.095, t = 14, n = 1. hence:

[tex]A=P(1+\frac{r}{n} )^{nt}\\\\9500=P(1+0.095)^{14}\\\\9500=3.56P\\\\P=\$2666[/tex]

Mr. and Mrs. Sanchez need to invest $2666 for 14 years in order to be able to contribute $9500 to her education.

Find out more at: https://brainly.com/question/22803385

9x minus 10 = 3x + 2

Answers

X=2 is the correct answer. Isolate the variable by dividing each side by factors that don't contain the variable.

suma de fraccion 1/5 + 5/8​

Answers

33/40

Step-by-step explanation:

you have to look for the lcm

1/5+5/8

8/40+25/40=33/40

Help please I’ll mark as brainliest!

Answers

Answer:

I think its B cause i was solving it and my answer came close to letter B

Step-by-step explanation:

i tried

Identifying Slope and Y-intercept (Word
Problems)
Alimousine service charges a $35 flat rate fee plus $2.50 per mile
if traveled. Identify the slope and y-intercept.
Identifying slope and y- intercept

Answers

Answer:

i dunno

Step-by-step explanation:

can u pls help me with this question ​

Answers

Answer:

A

Step-by-step explanation:

Options A, B and C  are the same:

2/3 is two-thirds (that how we read the fraction in English) and is 0.66666... (a decimal is sometimes permissible)

But most common and most used is a fraction

So, the answer is A

Ignore the marked answer, accidentally clicked it

Answers

From the Pythagoras's Theorem, we know that:

(Hypotenuse)² = (base)² + (perpendicular)²

We are Given:

We are given that the 2 legs (Base and Perpendicular) of the triangle are (m²-n² and 2mn)

Solving for the Hypotenuse:

replacing the variables in the Pythagoras's theorem, we get:

Hypotenuse² = (m²-n²)² + (2mn)²

Hypotenuse² = (m⁴ -2m²n² + n⁴) + (4m²n²)                  [(a-b)² = a² - 2ab - b²]

Hypotenuse² = m⁴ -2m²n² + n⁴ + 4m²n²

Hypotenuse² = m⁴ + 2m²n² + n⁴

Hypotenuse² = (m²)² + 2m²n² + (n²)²

Hypotenuse² = (m² + n²)²                                              [a² + 2ab + b² = (a+b)²]

taking the square root of both the sides

Hypotenuse = m² + n²

hellpppppp please I will give brainliest​

Answers

Answer:

ITS THE 2ND ONE

Step-by-step explanation:

Answer:

y = 5/4x - 1

Step-by-step explanation:

if you look at the graph you will probably be able to tell

im not trying to be me if you think

CAN SOMEONE PLS HELP
Which phrase best completes this table?
Table:
(Queen Hatshepsut's Accomplishments)
* Opened trade with many other regions
* Was only the second woman to rule Egypt
* ???????????

Options to choose from for the third one :

A. Gave women the same rights as men
B. Built many roads and temples
C. Made peace with the Hittites
D. Invaded the kingdoms of Punt and Somalia

Please help me I need an answer fast!
I REALLY NEED HELP

Answers

Answer:

B built many roads and temples

"mailing labels are sold in packages of 16 envelopes are sold in packages of 20 what is the least number of labels and envelopes you can buy so that there is one label on each envelope with none left over?"

Answers

Answer:

80 labels

Step-by-step explanation:

The number of packages are 16 envelopes and 20 envelopes

We solve using LCM Method

We find the Multiples of 16 and 20

Multiples of 16:

16, 32, 48, 64, 80, 96, 112

Multiples of 20:

20, 40, 60, 80, 100, 120

Therefore,

LCM(16, 20) = 80

The least number of labels and envelopes you can buy so that there is one label on each envelope with none left over = 80 labels

Answer:

80 labels

Step-by-step explanation:


What is an equation for the line that passes through the points (-2, 3) and (2, 1)

Answers

First find slope
(1-3)/(2+2) = -2/4 = -1/2
Y = -1/2x + b, plug in point
3 = -1/2(-2) + b
3 = 1 + b, b= 2
Final equation: y = -1/2x + 3

Choose the point-slope form of the equation below that represents the line that
passes through the points (-6,4) and (2,0). (2 points)

Answers

Answer:

y - 4 = -0.5(x + 6)

Step-by-step explanation:

Answer:(4-,6)

Step-by-step explanation:hope this helps  u i do my best to helps ever one

12,320 yd = how many MI

Answers

Answer:

7 mi

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

12,320 yds

Step 2: Define conversion

1 mi = 1760 yds

Step 3: Find mi

[tex]12,320 \ yds(\frac{1 \ mi}{1760 \ yds} )[/tex] = 7 mi

How many metres and centimetres are in 3080mm​

Answers

Answer:

3080mm = 3.08 meters

3080mm = 308 centimeters

Step-by-step explanation:

1 meter = 1000 mm

3080mm = 3080/1000 = 3.08 meters

1 centimeter = 10 mm

3080mm = 3080/10 = 308 centimeters

Which inequality shows the relationship between the plotted points on the
number line?
-8
0
A. -4<-8
B. -8<-4
C. -8>-4
O D. 4<-8

Answers

Could you include a photo?

Answer: if yall need the answer for this then its C

Step-by-step explanation:

Describe the graph of y = negative x squared and compare it with the graph of y = x squared.

Answers

Answer:

The graph of the first equation opens downward while the graph of the second equation opens upward.  Both graphs are parabolas that pass through 0,0.

Answer:

The graph of the first equation opens downward while the graph of the second equation opens upward. Both graphs are parabolas that pass through 0,0.

Step-by-step explanation:

This was the possible answer that was given :)

Which number is the additive inverse of -4
-442
O
-4
O
45
V

Answers

Answer:

it's the last one i mean 4&1/4

Answer:

last image== four and one fourth

Help Please I really need help!

Answers

400+60x

because the flat rate will stay the same, depending on how many hours or labor is how much more money you will pay. 60 dollars per hour of labor

what is 15+15 I need help

Answers

Answer:

30

Step by step explanation:

lol

I just need an answer

Answers

Answer:

Step-by-step explanation:

The similar things between the two is that they both to through the y-intercept and x-intercept, but one graph is positive and the other is negative and also have different slopes.

. A sporting goods store offers a rewards program where the customer earns a $20 gift card for every 1,500 points. Suppose a new customer receives a certain number of points when signing up and earns a number of points for every dollar purchased at the store. If a new customer has 750 points after spending $30 and 1,025 points after spending $85, how much does the customer have to spend to earn the first gift card?​

Answers

390 because 1025 plus 85 =1,110-1,500 = 390 so he has to spend 390 more

Suppose a trapezoid with the vertices (3,-7) , ( 0,5 ) ,(2,5) , and (5,-7 ) was reflected across the x-axis. Which of these would be a vertex of the reflected figure

A. ( -7,5)
B (-3 ,7)
C (2,5)
D(3,-7)

Answers

It’s (-3,7)

Step by step explanation

I am not the best at explaining but he opposite of(3,-7) is (-3,7) the way I did it is way better than the explanation but it’s (-3,7)

Four less than 6 times a number is the same as the number plus 11.
Complete the equation

Answers

Answer:

×=3

Step-by-step explanation:

6x-4 = x+11

6x-x = 11+4

5x = 15

x = 3

What mathematical property is represented by the equation below

c+d=d+c

Answers

Answer:

Step-by-step explanation:

c+d=d+c

Associative Property

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:45 mins.

Step-by-step explanation: half of 30 is 15 (one box = 15) and 15 times 3 is 45

please help me I asked like 2 times and no one has helped :/

Answers

Answer:

A and B are parallel.

Dianna and lucile walked to their granfather's house to visit him. It took them 2/5 of an hour to get there and 1 ½ hours to get back home. How much time did they spend in going both ways?
What is asked? __________
What are given? __________
Write the mathematical sentece________
Solution and answer _______

Answer it please​

Answers

how to do it and the answers are above

i hope this help you

if you don't understand, please comment ✔️✔️✔️

Answer:

1h 54 mins

Step-by-step explanation:

What is asked? : time did they spend in BOTH ways

What are given? : time they go and back

Write the mathematical sentece :

[tex]( \frac{2}{5} \times 60) + (1 \frac{1}{2} \times 60) = [/tex]

Solution and answer : (24) + (90) = 114 mins

= 114 mins - 60 mins

= 1h 54 mins

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