Mathematics College

Please help me with this question.​

Please Help Me With This Question.

Answers

Answer 1

Step-by-step explanation:

Mean of the origibal set = 20

No. of terms = 10

Sum = Mean x No. of terms

= 20 x 10 = 200

The sum of additional numbers to make the new set of observstion is 4 + 8 + 12...... + 40 = 220

New Sum = 200 + 220 = 420

The no of terms stay the same

New Mean = New Sum/ N

= 420/10

= 42

Related Questions

70+95 Factor the expression using the GCF

giving brain

Answers

Answer:

70 + 95 = 5(14 + 19)

70 + 95 = 5(14 + 19)

gcf = 5

Step-by-step explanation:

70+95

70=2*5*7

95=5*19

70+95=(5*2*7)+(5*19)=(5*14)+(5*19)=5*(14+19)=5*(33)

5*33=165 and 70+95=165                                                                                                  Hope this helps! Please give me brainly!      

i hope the internet knows how to do this i dont​

Answers

All the answers are in the picture attached.

I give brainalist and points for an answer and explanation

Answers

Answer:

option D

Step-by-step explanation:

diameter of two small circle i.e 14cm

radius of two small circle =7cm

area of the small circle =πr²

area of the small circle=22/7 x7²

area of the small circle=154cm²

Radius of bigger circle =14cmArea of bigger circle=πr²

Area of bigger circle=22/7×14²

Area of bigger circle=616cm²

Area of shaded region =area of bigger circle -area of small circle +area of small circle

area of shaded region =616-154+154

area of shaded region=308cm²

i.e approximately 282.74cm²

find the percent of the quantity of 110% of 300​

Answers

Step-by-step explanation:

hop it help you.......

.....

330

Step-by-step explanation:

100% of 300 = 300

10% of 300 = 30

300 + 30 = 330

Need help with this asap!!

Answers

Answer:

≈ 53.7° (Option 3)

Step-by-step explanation:

In the figure given above , the lengths of other two sides (excluding hypotenuse) are known to us. So , it would be convenient to use 'tan'.

Length of side opposite to angle 'x' = 15 cm

Length of side adjacent to angle 'x' = 11 cm

Using 'tan' formula - [tex]\tan x = \frac{Side \: opposite \: to \: x}{Side \: adjacent \: to \: x}[/tex] , lets solve this.

[tex]=> \tan x = \frac{15}{11}[/tex]

Using inverse tan function , lets find x.

[tex]=> x = {\tan}^{-1}(\frac{15}{11} )[/tex] ≈ 53.74°

Please help me with this question

Answers

The answer is
FCG & GCF

A sporting goods store is discounting all
sports balls 55%. Which value is equivalent to this
percent?
A. 15/25
B. 11/20
C. 5/10
D. 5/55

Answers

The answer is B because 11/20 = 0.55
Answer: 11/20

Explanation:
11/20 = .55
.55 = 55%

Brainliest???

Gribbles are small, pale white, marine worms that bore through wood. While sometimes considered a pest since they can wreck wooden docks and piers, they are now being studied to determine whether the enzyme they secrete will allow us to turn inedible wood and plant waste into biofuel.1 A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72. Give a best estimate for the length of gribbles, a margin of error for this estimate (with 95% confidence), and a 95% confidence interval.

Answers

Answer:

The best estimate for the length of gribbles is of 3.1 mm.

The margin of error for this estimate, with 95% confidence, is of 0.2 mm.

The 95% confidence interval is between 2.9 mm and 3.3 mm.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

Best estimate for the length of gribbles

The best estimate is the sample mean, that is 3.1 mm.

Margin of error:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 50 - 1 = 49

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.01

The margin of error is:

[tex]M = T\frac{s}{\sqrt{n}} = 2.01\frac{0.72}{\sqrt{50}} = 0.2[/tex]

In which s is the standard deviation of the sample and n is the size of the sample.

The margin of error for this estimate, with 95% confidence, is of 0.2 mm.

Confidence interval:

The lower end of the interval is the sample mean subtracted by M. So it is 3.1 mm - 0.2 mm = 2.9 mm

The upper end of the interval is the sample mean added to M. So it is 3.1 mm + 0.2 mm = 3.3 mm

The 95% confidence interval is between 2.9 mm and 3.3 mm.

A=4
B=16

A² + B

Work out the answer

Answers

A^2 + B = (4)^2 + 16
(4)^2 = 16
16 + 16 = 32
Answer is 32

Answer:

32

Step-by-step explanation:

Plug in the corresponding numbers to the corresponding variables. Note that:

A = 4

B = 16

A² + B

(4)² + 16

Remember to follow PEMDAS. PEMDAS is the order of operation, and stands for:

Parenthesis

Exponents (& roots)

Multiplication

Division

Addition

Subtraction

~

First, solve the power:

(4)² = 4 * 4 = 16

Next, add:

16 + 16 = 32

32 is your answer.

~

Hi pls help me thanks :)

Answers

The answer is c you have to flip turn mutiplu

Answer:

B

Step-by-step explanation:

help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

This is the correct graph but can it fit on your graph?

Step-by-step explanation:

Answer:

is in the photo

Step-by-step explanation:

hope this helps

Which set can represent the side lengths of a right triangle?


A. 5,11,12
B.2,4, 2sqrt 5
C.6, 7, sqrt 21
D. 5, 7, 5, sqrt 3

Answers

Answer:

B

Step-by-step explanation:

2²+4²

=4+16

=20

=√20

which is the same as

=√4×5

= sqrt of 4 is 2

therefore 2√5

B hope this helps ...........

What is the difference between change in quantity and change in quantity demanded? ​

Answers

A change in demand means that the entire demand curve shifts either left or right. A change in quantity demanded refers to a movement along the demand curve, which is caused only by a chance in price.

Solve. h+ 10.6 = -10.6 h= what ​

Answers

Answer:

h= -21.2

Step-by-step explanation:

Subtract 10.6 from both sides to isolate the h

h + 10.6 = -10.6    - 10.6    -10.6h= -21.2

Now lets check the answer

-21.2 + 10.6 = -10.6

-10.6 = -10.6 ✅

I hope this helps!

X = y-2
2x-y=2

X=
Y=

Answers

Answer:

y =4 and x=6 hope it may help u

Proportions to Solve Problems - Item 3335
In a box of 36 pencils, 20 are sharpened.
What is the ratio of sharpened pencils to unsharpened pencils?

Answers

Answer:

20:16

Step-by-step explanation:

Subtract the number of sharpened pencils you have from the total number and you have your ratio.

6. Select the figure that can be formed when a cube is cut by a plane parallel to its base.





A. line

B. square

C. trapezoid

D. triangle





7. Select all figures that can be formed when a rectangular pyramid is cut by a plane parallel to its base.





A. point

B. rectangle

C. trapezoid

D. triangle





8. This is a cylinder.






Select all figures that can be formed by a vertical slice perpendicular to the bases of the cylinder.

A. circle

B. line segment

C. rectangle

D. oval





9. A family just removed a big tree from their backyard. The diameter of the circular hole left behind is 7 feet across. Approximately how many square feet of grass will the family need if they want to cover the area where the tree once was?





A. 22 ft²

B. 39 ft²

C. 44 ft²

D. 154 ft²

Answers

Answer:

Step-by-step explanation:

6. Cross-section is a square.

:::::

7. Point and rectangle

:::::

8. line segment and rectangle

:::::

area of hole = π3.5² = 12.25π ≅ 39 ft²

Which of the following polygons is not a regular polygon?

Answers

Answer:

b

Step-by-step explanation:

polygons is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain or polygonal circuit

Answer:

rectangle is the answer can i get a brainlist

Step-by-step explanation:

Yall I just realized I skipped 4 and 5- but here's question 4

Answers

the sum of five and the quotient of two and four
because u do division first

Help me please!

Two-thirds of the students in Hannah's homeroom plan to do some volunteering this summer. Of these students,3/5 plan to volunteer at the community center. What fraction of students in Hannah's homeroom plan to volunteer at the community center this summer.

I would rather not have the answer in a file thank you!

Answers

2/3 are volunteering.

3/5 are volunteering at the community center.

Multiply the amount from the community center by the total volunteering:

2/3 x 3/5 = (2x3) / (3/5) = 6/15  this can be reduced to 2/5.

The answer is 2/5

A shirt regularly costs $14, but is on sale for 10% off. Sales tax is 6%. What is the cost of the shirt?

Answers

Answer:

13.356

Step-by-step explanation:

10/100 = 1.4

14-1.4 = 12.6

12.6*6% = 13.356

4 + (7-5)^4 on an iready lesson can someone help ?? the four is a exponet

Answers

20. Let me know if you want a step by step.

Please Im stuck. One box contains 24 bottles of soda. Each bottle contains 0.5 dl. Alex celebrates his birthday and 1/3 of the bottles are drunk. A) How many bottles are drunk? B) How many liters of soda are drunk in total on the birthday?

Answers

Answer:

(a) 8 bottles(b) 0,4 Litres

Step-by-step explanation:

There are

24 bottles/box0,5 decilitres/bottle = 50mL/bottle = 50 × 24 bottles = 1200mL = 1.2 Litres1/3 of the bottles are drunk = 1/3 × 24 = 8 bottles are drunk (a)8 bottles × 50 mL = 400 mL = 0,4 Litre

____________________

#IndonesianPride - kexcvi

I need help quick just the first one

Answers

Answer:9& 5

Step-by-step explanation:

Assignment 1
Mathematics
Question 1
1.1.
Write down the factors of 30.​

Answers

Answer:

1,2,3,5,6,10,15,30

Step-by-step explanation:

1*30

2*15

3*10

5*6

Simplify the expression m 4/5x m1/10

Answers

Answer:

√x4

Step-by-step explanation:

(x^2+x−3)⋅(x^2−4)

(y^2+6y+8)−(y^2+y−12)

The cost of 3 DVD's and 4 CD's is £62.00. The cost of 4 DVD's and 3 CD's is £64.00. Find the cost of each.
Help!!!

Answers

Answer:

the cost of each is  £10 and  £8 respectively

Step-by-step explanation:

Let us assume the cost of per DVD be x

And the cost of per CD be y

Now as per the question

The following equations should be made

3x + 4y = £62.00

4x + 3y = £64.00

Now multiply by 4 in equation 1 and 3 in equation 2

12x + 16y = £248

12x + 9y = £192

7y =  £56

y =  £8

Now put the value of y in any of the above equation

3x + 4( £8) =  £62

3x +  £32 =  £62

3x = 30

x =  £10

Hence, the cost of each is  £10 and  £8 respectively

(7x^2- 3y)^2 simplify

Answers

Answer:

49x^4-42x^2 y+9y^2

Step-by-step explanation:

Answer:

49x^4-42x^2 y+9y^2

Step-by-step explanation:

it a tets please help it due today​

Answers

I believe it’s A hope you get it right

1) Solve quadratic equations by factoring.
2x^2 + 5x - 12 = 0

Answers

(2x-3)(x+4) —> x= 3/2 x= -4

Answer:

[tex] x = - 4, \: \: x = 1 \frac{1}{2} [/tex]

Step-by-step explanation:

[tex]2 {x}^{2} + 5x - 12 = 0 \\ \\ 2 {x}^{2} + 8x - 3x - 12 = 0 \\ \\ 2x(x + 4) - 3(x + 4) = 0 \\ \\ (x + 4)(2x - 3) = 0 \\ \\ x + 4 = 0, \: \: 2x - 3 = 0 \\ \\ x = - 4, \: \: x = \frac{3}{2} \\ \\ x = - 4, \: \: x = 1 \frac{1}{2} [/tex]

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