Mathematics Middle School

Help me 30 points plzzzz

Answers

Answer 1

Answer:

112.3

Step-by-step explanation:

A = 9 × 8.7 + 2(8 + 9) = 112.3

Answer 2

The answer is 8.7 mm

Related Questions

ASAP
Elsa has scored 16, 29, and 21 points and her three games so far how many points does she need to score in her next game so that her average (mean) is 22 points per game.

Answers

Answer:

Step-by-step explanation:

her average is already 22 so she needs to score 22 points for it to stay the same

Please help will mark brainliest! random answers will be reported

Answers

Answer:

65°

Step-by-step explanation:

the angle of a straight line has to add up to 180°

if it doesn't, it's not a straight line

115° and x are supplementary angles

meaning we know they have to add up to 180°

so simply subtract

180- 115 =

65°

you can check work by adding

115+65= 180

Answer: 65

180-115=65

Step-by-step explanation:

A straight line is always 180 so I subtracted 115 from 180.

Have a nice day. :-)

Brainly plz help only three questions and don't answer for point kinda rude

Answers

Answer:

look down

Step-by-step explanation:

(8) no because 3.5*6.5=22.75 and that is over 20 square feet

(9) 34-19-7 * 17/2 = 17*17/2=144.5cm^2

(10) 4*6/2=12 so 1 can but if we are talking technical here it is 3/25

The questions are a bit broad so these might be incorrect

4. The figure shows a rectangle with a width of 6k inches. The length of the rectangle is 4 inches shorter than the width.
a.) Find the length of the rectangle in terms of k.
b.) What is the perimeter of the rectangle in terms of k?
c.) If k = 6, find the perimeter of the rectangle.

Answers

Answer:

Step-by-step explanation:

sorry if its not correct but i hope it helps

Answer:

c is the correct answer

Step-by-step explanation:

HELP ASAP WILL GIVE BRAINLIEST! ANSWER ALL AND TELL ME WHAT ANSWER FOR WHAT QUESTION OR YOU WILL GET REPORTED.

Answers

Answer: 12 cm

Step-by-step explanation:

7. 3cm
8. B
9. D
10. 3.38 or 36
Sorry if they’re wrong I did it supper fast

hellllllllllllllllllllllllllllllllllllllllpppppppppppppppppppp

Answers

Answer:

A) 52

Step-by-step explanation:

Each answer, when you divide, all equal to 52

I think that its equal to 52 in a

which of the following expressions is positive for any value of a: a^2+4,(a+8)^2, 5a^2+2,a+13,(a-4)^2+4,(a+10)^2-1

Answers

Answer:

I am not sure this is a real math equation

Step-by-step explanation:

There is no way to answer this. No elimination or substitution method would solve this. Sorry.

Please answer show all your work or tell me the steps
choose any question to do or do all of them i dont care

1. The original cost of an item is $64 but you have to pay $78.08. What is the percent markup.?

2. If sales tax rate is 7% how much would you pay for an item that is $23.36

3.If the sales tax rate is 8.25% how much would you pay for an item that is $24.00

4.Original value:140 New value:98 what is the percent change

5. an item priced $30.82 is on sale for a 15% off. What is the sale price of the item

6. if the sales tax rate is 7.6%, how much will you pay on a $330 item

7. a $129 item is marked up 20% how much is the markup

8.four friends go out to eat and their meal costs $86.50. The sales tax is 6.75% and they should tip the waiter 20% how much should each person pay to the nearest cent

9.original cost: $35 new cost: $38.22
what is the percent increase

Answers

Answer: for the first one it is 22 percent

Step-by-step explanation: first I found out that 14.08 is In-between 64 and 78.08 . Then I devided 14.08 by 64 so I got 0.22 then i made that a percentage by multiplying it by 10. So the answer is 22 percent. Please mark me brainiest.

I did it on the other one but here is the full explanation

The second one is $25 because 23.36 times 7% equals 1.36 then add 23.36 and 1.36 and you get $25

ASAP IT HAS TO BE DONE BY 5:00pm!!!

Answers

Ok I will help you but can you tell me how to ha so a tutor

Use the method of your choice to determine the following probability.

Drawing three twos in a row from a standard deck of cards when the drawn card is not returned to the deck each time.

Answers

Can you please explain?

4/52 x 3/51 x 2/50 there ya go

Arwa is playing 'Guess my number'. Arwa says: 'If I add 0.4 to my number, divide the answer by 8, then multiply that answer by 9, I get 0.9.' What is Arwa's number?

Answers

0.4 is the answer because you if you work backwards and use inverse operations you get 0.4.
meaning, if you divide 0.9 by 9, you get 0.1. when you multiply 0.1 and 8 you get 0.8. and when you subtract 0.4 from 0.8 you get your answer, 0.4.

In 2015, a person working in the United States paid 10%income tax for income up to $9225. Income between $9226 and $37,450 was taxed at 15%.
Suppose John earns $9225. How much of his earnings does John take home after taxes?

Answers

answer: he will take $8302.5 home with him!!

8302.5 is the answer AHHA

A cylinder has a volume of 72 cubic inches. What is the volume of a cone with the same height and radius as the cylinder? explain (I don't have a picture of a cylinder sorry)

Answers

Explanation:

Formula: Volume = Length × Width × Height

which has the lowest iqr

Answers

Group A is the answer

Answer:

B Group A has the lovvest IQR

The rectangular pyramid shown has a volume of 1,560 cubic inches. What is the height of the pyramid? Explain how you found your answer

Answers

Answer:

Step-by-step explanation:

The volume formula is length x width x height ÷ 3. Triple the volume of a pyramid and then divide that amount by the area of the base to calculate its height. For this example, the volume of the pyramid is 200 and the area of its base is 30.

Answer:

Step-by-ya mamastep explanation:

Can someone Solve this for me real quick?
-8( x + 1 ) + 2x = -32

solve for x

Answers

-8x-8+2X= -32
-6x= -32+8
-6x= -24 multiply both sides by -1
6x=24
X=4

Now can you help meeeeeeeee

Answers

Answer: 1-27 2-8 3-9 4-32

Step-by-step explanation:

8 x4 = 32 and 9x3 =27

They say that smoking can reduce your life expectancy by 20%. If the life expectancy for a non-smoker is 90 years old, what is the life expectancy for a smoker?

Answers

The Life Expectancy for a smoker Is 40 years.

The answer is more than likely 72.

Please please find the area for this polygon!

Answers

Answer:

508

Step-by-step explanation:

28*16= 448

6*6= 36

4*6= 24

448+36+24= 508

In order to find the area of a polygon, all you have to do is follow the formula: area = 1/2 x perimeter c apothem. To sum it together, perimeter = the sum of the lengths of all the sides. So add 6, 16, 16, 6, 4, 6, 28, and 18! And then you have 100! Then multiply it by 1/2! So your answer should be 50. Please consider brainliest.

Is the expression 6(2d+ 4f) - 3f equivalent to the expression 8d+ 28f +4d -7f?
Explain your answer.
will give brainiest

Answers

no it isn’t equivalent

I don’t know what to say because this is hard for me

PLEASE ANSWER!!!!!!
The semicircle below has a diameter of 20. Find the area of the blue region.

Answers

Answer:

Step-by-step explanation:

Use the area of semicircle minus the area of the triangle. Area of the semicircle is 10^2 * pi / 2 = 50 pi, the area of the triangle is 12*16/ 2 = 96. The the area for the blue part is 50 pi - 96 = 61.07963268 or 61.

If it is helpful, plz give me Brainliest.

Answer:

50pi - 96

Step-by-step explanation:

The radius of the semicircle is 10, so the area of the entire semicircle is 1.2*10^2 pi = 50pi

The white triangle has an area of 1/2*12*16 = 96 so subtracting it shows that the blue area is 50pi-96

Plz answer. What is the sum? 3x^2-2x-1/x-5 + -2x^2+x-5/x-5

Answers

Answer:

It is D, trust me because Doge said so.

Step-by-step explanation:

sat prep find y in equilateral triangle ABC.
a. 90 b. 70 c. 60 d. 40

Answers

Answer:

the ans

Step-by-step explanation:

what is the solution for the inequality x-40>20

Answers

X-40 remains the same

The problem is about the percent of students who prefer certain kinds of music. The math information given is 40% like hip hop, 5% like Baby Shark, and 100 students prefer hip hop music. I wonder how many 6th grade students there are at the school?

Answers

Answer:

250

Step-by-step explanation:

if 40% of the students are in the 100 then that means each student is 2.5%.

im not exactly sure what the question was but i think this is the answer

I might just be the opposite of smart but this question made no sense to me.-

Answers

I believe it’s C because if you look at exactly where the boxes end they both almost exactly end at 10 numbers past the first one

Answer:

I got ya

Step-by-step explanation:

k so I know it is not C or D tho I think it is A

Hope this helps if so please brainliest

Plz help me!!!!!!!!!!!

Answers

Answer:

1. B

2.D

3.A

4.C

Step-by-step explanation:

Brainlist plz

1=94 square inches
2=96 square inches
3=76 square inches
4=75 square inches

plz help i am so busy plz plz help me

Answers

D=60
DEC=50
CER=130

(X=30)

The first is 60 ! Good luck

What scale factor was applied to the first rectangle to get the resulting image?

Enter your answer as a decimal in the box.

Answers

Answer:

Step-by-step explanation:

If you multiply 2.5 x .2 you get .5 meaning .2 is the scale factor

Answer: 0.2

Step-by-step explanation: All you got to do is multiply the rectangle with 2.5 by 0.2 to get the scale factor.

What is the lateral Surface Area rounded to the nearest hundredth?

Answers

Pretty sure it’s 109.96

Answer:

109.96

Step-by-step explanation:

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