Class A has 12 pupils and class B has 25 pupils.
Both classes sit the same maths test.
The mean score for class A is 80.
The mean score for both classes is 74.
What is the mean score (rounded to 2 DP) in the maths test for class B?

Answers

Answer 1

Answer:

71.12

Step-by-step explanation:

80*12= 960

37*74=2738

2738-960=1778

1778/25=71.12

Answer 2

Answer:

71.12

Step-by-step explanation:

80*12= 960

37*74=2738

2738-960=1778

1778/25=71.12

Mark it as brainly please


Related Questions

1/2(-1.4m + 0.4) = ? m + 0.2 using DISTRIBUTIVE PROPERTY

Answers

Answer:

= -0.7 m + 0.2

[tex] \frac{1}{2} ( - 1.4m + 0.4) \\ = - 0.7m + 0.2[/tex]

Solve the equation 8-2x=-8x+14

Answers

Answer:

x= -3/5

Step-by-step explanation:

What are the center and radius of the circle defined by the equation
x2 + y2 - 6x+10y + 25 = 0 ?
O A. Center (3,-5); radius 9
B. Center (-3, 5); radius 3
C. Center (3,-5); radius 3
D. Center (-3, 5); radius 9

Answers

Answer: Center (3,-5); radius 3

Step-by-step explanation:

The center and radius of the circle defined by the equation is (3, -5) and 3.

What is Equation of Circle?

The standard equation of a circle is given by:

(x-h)² + (y-k)² = r²

Where (h,k) is the coordinates of center of the circle and r is the radius.

We have Equation,

x² + y² -6x + 10y +25= 0

Now, rearranging the terms

x² -6x + y² +10y +25 = 0

Now, add and subtract 9

x² -6x + 9 + y² +10y +25  -9 = 0

(x-3)² + (y+5)² = 3²

(x- 3)² + y(-(-5))² = 3²

So, the Centre of Circle is (3, -5) and the radius is 3.

Learn more about Equation of Circle here:

https://brainly.com/question/29288238

#SPJ5

I NEED HELPPPPPPPP!!!!!!!!!!

Answers

Answer:

the second one is the largest

Step-by-step explanation:

which is greater? 0.04 or 0.39

Answers

Answer:

0.39

Step-by-step explanation:

think about it this way, if you take away the decimal it would be 39 and 04. 04 is another way to write 4 and  4 is less than 39. so 0.04 is less than 0.39

Answer:

0.04 > - 0.39

Step-by-step explanation:

0.04 > - 0.39

Find volume of the irregular
Shape


Answers

9514 1404 393

Answer:

  36 cm²

Step-by-step explanation:

This shape can be considered to be a 6 cm by 7 cm rectangle with a 2 cm by 3 cm area cut from the lower right corner. Its area is then ...

  area of full rectangle - area of cutout

  = (6 cm)(7 cm) -(2 cm)(3 cm)

  = 42 cm² -6 cm² = 36 cm² . . . . area of irregular figure

what is the volume of the prism 2m x 3m x 5m​

Answers

Answer:

30 m³

Step-by-step explanation:

2 m x 3 m x 5 m= 30 m³

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Pete's Pizza has a mean delivery time of 29 minutes with a standard deviation of 3 minutes. Determine the z-score for the number of pizzas delivered in less than 25 minutes.

Answers

Answer:

9 pizzas

Step-by-step explanation:

the right aswer is -1.33

7 Rahat has a recipe for muffins that
uses 2 cups of four for 18 muffins
He wants to halve the recipe.
How much tour wil he need?

Answers

Answer:

the answer is 1

Step-by-step explanation:

if you are splitting the recipe in half then just split the amount of the ingredients in half too

half of the 2 cups of flour would be 1 cup of flour

you would also get 9 muffins instead of 18 muffins

Write the ratios for sin A and cos A.

Answers

Answer:

Step-by-step explanation:

I am pretty sure it is B because if you do SOH CAH TOA you get that

Select the correct answer.
Point P is the centroid of triangle JKL.
R
16
30
S
What is QL?
OA 32
OB. 45
OC 46
OD
48
OE. 64
Reset
Next

Answers

Answer:

D. 48

Step-by-step explanation:

QP = 16 (given)

LP = ?

Given that P is the centroid of the triangle, therefore:

QP = ⅓(QL) (based on the centroid theorem)

Plug in the value

16 = ⅓(QL)

Multiply both side by 3

3*16 = QL

48 = QL

QL = 48

A bus makes a stop at 2:30, letting off 10 people and letting on 3. The bus makes another stop ten minutes later to let off 2 more people. How does the number of people on the bus after the second stop compare to the number of people on the bus before the 2:30 stop?

Answers

1 person is still
on the bus


HELP HELP HELP HELP

What is the equation of the trend line in the scatter plot ?

Answers

The answer to this scatter plot question is y=1/3x-9

2.93 km
Before the eruption of a volcano, the volcano was 2.93 kilometers
high. After the eruption, the volcano was 2.53 kilometers high
Use the bar diagram to find the difference in height of the volcano
before and after the eruption, in meters,
2.59 km
Click the icon to see the metric units of length
meters,
The difference in height of the volcano before and after the eruption is
(Type a whole number or a decimal)

Answers

Answer:

0.4

Step-by-step explanation:

Leroy wants to teach his puppy 6 new tricks. In how many different orders can the puppy learn the tricks?​

Answers

Answer: 720 ways

Step-by-step explanation:

Given

Leroy wants to teach his puppy 6 new tricks

Considering each trick is different from other

The first trick can be taught in 6 different ways

After learning the first trick, there are 5 tricks remaining which can be taught in 5 different ways

Similarly, for the remaining tricks, it is 4, 3, 2, and 1 way

So, the total number of ways is [tex]6\times 5\times 4\times 3\times 2\times 1=720\ \text{Ways}[/tex]

Answer this question please ASAP!!!

Answers

17.4%

If helped mark me the brainiest!!

ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP ASAP NEED HELP​

Answers

Step-by-step explanation:

always begin any problem by writing what you know

circumference is

u = 2 pi r

1)

u=3.14

r=?

3.14 = 2 pi r

Solve for r

the rest of the problems you just plug the numbers into the formula

wow

wow wow

wow

wowowwowowoowwowowowowoow

I am a line that intersects a circle at 2 points WHAT AM I?​

Answers

if it’s a riddle i have no idea. if it’s a math question related to the rules of circles it would be a secant line.

If a =5 and b=3 what is the value of the 2a-3b+3a

Answers

Answer:

If a = 5 and b = 3, then that means 2a - 3b + 3a = 16

Step-by-step explanation:

2a - 3b + 3a

(2×5) - (3×3) + (3×5)

10 - 9 + 15 = 16

All I need is for someone to explain how you get this answer !!
(The answer is the bottom part)

WILL MARK BRANLIEST

Answers

This is one of the easiest ways to get the answer

Answer:

THATS EASY HAHA JJUST DOWNLOAD THIS APP MATHSOLVER ITS EFFECTIVE

Step-by-step explanation:

HOPE IT HWLPS

Find the coordinates of point B on AC such that AC is 6 times long as AB.

Answers

Answer:

I think it's 36 I'm not sure because you did give me more to go off of to help you sorry if it's wrong


The school drama club had 40 students in it last year. This year, the club has 52 students.
What is the percent increase in the number of students from last year?

Answers

Answer:

30% increase

Step-by-step explanation:

Which statements are true?
Select each correct answer.
A. All triangles have 3 straight sides.
B. Only some triangles are polygons.
C. All triangles are plane figures.
D. All triangles have 3 angles.
E. All triangles have one right angle.

Answers

Answer:

C. c. c.c.c.cc.c.c.

Step-by-step explanation:

peter weighs is 105 kg he wants to lose 500 g per week how many weeks will it take for him to have a mass of 90 kg ?

Answers

Answer:

it will take him 30 weeks

Step-by-step explanation:

2 weeks = 1 kilogram lost

105-90=15

1 x 15 = 15

2 x 15 = 30

Answer Choices:
A. 0.26
B. 0.56
C. 0.52
D. 0.31

If you answer back with a link your comment will be reported.

Answers

The best answer to go with is b

902
If the probability that a person will die in the next year is
what is the
100,000'
probability that the person will not die in the next year?
A. 0.902%
B. 99.098%
C. 0.098%
D. 99.902%

Answers

Answer:

B. 99.098%

Step-by-step explanation:

The probability that the person will not die in the next year is 99.098% .

Correct option is B.

What is probability?

Measure of the likelihood of an event happening is called Probability. Probability can be between 0 to 1. 0 means the event cannot happen, 1 indicates the specific event. The sum of the probabilities of all events in the sample space is 1.

Probability can be defined as the ratio between the number of favorable outcomes and the total number of outcomes of an event. For a trial with “n” number of results, the number of favorable outcomes can be denoted by x. The formula for calculating the probability of an event is as follows.

Probability (Event) = Favorable Outcome/Total Outcome = x/n  

Given,

Probability of a person will die next year = 902/100000

sum of the probabilities of all events in the sample space is 1.

Then probability of the person will not die in the next year

= 1 - 902/100000

= 1 - 0.00902

= 0.99098

= 0.99098 × 100/100

= 99.098%

Hence, 99.098% is the probability that the person will not die in the next year.

Learn more about probability here:

https://brainly.com/question/30034780

#SPJ7

Find the volume of the cone. Round your answer to the nearest hundredth.
A) 129.72m^3
B) 134.04m^3
C) 137.71m^3
D) 143.04

Answers

Answer:

can we get the figure plz

In the image, two circles are centered at A. The circle containing was dilated to produce the circle containing B!
What is the scale factor of the
dilation?
O A. 1
OB. 2
OC. 0.5
OD.
-0.5

Answers

OB.2 is the correct answer I think

30)
The variable y is directly proportional to the variable x. If y = 12 when x = 14, what is the value of x when y = 747

Answers

Answer:

871.5

Step-by-step explanation:

directly proportional

y = kx

y = 12 when x = 14

12 = k(14)

k = 12/14

k = 6/7

--------------------------

what is the value of x when y = 747

747 = (6/7) * x

Multiply both sides by 7/6

747 * 7/6 = x

871.5 = x

The area of a rectangular shaped pool is 64 squared meters. The width is 9 meters. Write and solve an equation to determine the length of the pool. Show work.

Answers

Answer:

7.11

Step-by-step explanation: Area=lengthxwdth

64=lengthx9

64/9=length

7.11=length

Other Questions
Average Rate of Return, Cash Payback Period, Net Present Value Method for a Service CompanySpanish Peaks Railroad Inc. is considering acquiring equipment at a cost of $1,250,000. The equipment has an estimated life of eight years and no residual value. It is expected to provide yearly net cash flows of $312,500. The companys minimum desired rate of return for net present value analysis is 12%.Present Value of an Annuity of $1 at Compound InterestYear 6% 10% 12% 15% 20%1 0.943 0.909 0.893 0.870 0.8332 1.833 1.736 1.690 1.626 1.5283 2.673 2.487 2.402 2.283 2.1064 3.465 3.170 3.037 2.855 2.5895 4.212 3.791 3.605 3.353 2.9916 4.917 4.355 4.111 3.785 3.3267 5.582 4.868 4.564 4.160 3.6058 6.210 5.335 4.968 4.487 3.8379 6.802 5.759 5.328 4.772 4.03110 7.360 6.145 5.650 5.019 4.192Compute the following:a. The average rate of return, giving effect to straight-line depreciation on the investment. If required, round your answer to one decimal place.%b. The cash payback period.c. The net present value. Use the above table of the present value of an annuity of $1. Round to the nearest dollar.Present value of annual net cash flows $Amount to be invested $Net present value $ Brainliest if correct LINKS WILL BE REPORTED Which of the following words is NOT a place?le sigela salle non-fumeurle parc nationalle site Simplify: [tex]\sqrt[3]{\frac{x^2}{8y^{-1}} }[/tex]Thank you! Solve for Vescula e vacolo so a mesma coisa ? simplify the expression (4x^9 y^3) (-5x^6) (-3y^2) I don't have a clue! I WILL MARE BRAINLIST Help Me Please!!!!!!!! Below. What is m1?m1 = Cul es el mensaje en este "Oda a la Pobreza"? How do u and justify a document Determine if the sequence below is arithmetic or geometric and determine thecommon difference / ratio in simplest form.11, 6, 1, ... What is the number of moles of solute in 250 mL of a 0.4M solution?a. 0.1 molc. 0.62 molb. 0.16 mold. 1.6 mol How does Ceres discover what happened to Proserpina?1.Helios told her that Pluto had kidnapped her.2.Hecate told her.3.She figured it out on her own.4.She had a dream about ProserpinaHELP! 4x 410x 2015x + 153x 36x 1220x + 20. All of the following are similarities between AP classes and dual enrollmentcourses except which?A. Both provide opportunities to earn college credit.B. Both are classes.C. Both can be taken in high school.D. Both cost tuition. Really stuck on this question !! Pls help A purpose of postmortem care is to make the body ready for family viewing.TRUE OR FALSE? Which of these WOULD NOT be an appropriate subject for a vignette?A. The time you got hit in the face by your surfboard.B. The time a dolphin popped up in front of your surfboard.C. The first day you surfed.