Mathematics Middle School

Please help
8th pre-algebra math

Please Help 8th Pre-algebra Math

Answers

Answer 1

Answer:

The first one

Step-by-step explanation:

Related Questions

A beach diver descends 110 feet in 10 minutes at a constant rate. Find the rate of the beach diver’s change in position per minute?

Answers

Answer:

11

Step-by-step explanation:

We are dividing.

110 / 10 = 11

the answer is 11 bc were dividing.

This composite figure is made of three identical cylinders that are connected together

Radius:3 Height:8

Answers

The surface are of a cylinder is

SA = 2πr2 + 2πrh

where:
r = radius
h = height

This formula comes from adding the areas of the surfaces of the cylinder. It has two flat circular faces and a rounded face.

If we cut the cylinder from the circular face symmetrically, the surface area for one piece will be

SA = 2[(πr2)/2] + (2πr/2)h + 2rh

We will have 2-half flat circular faces, a flat rectangular surface, and half of the rounded surface.

Simplify the SA formula.

SA = πr2 + πrh + 2rh
SA = r(πr + πh + 2h)

Substitute the values into this formula.

SA = 3(3π + 8π + (2*8))
SA = 3(11π + 16)
SA = 33π + 48
SA = 151.67 cm2

Since we have 2 pieces, multiply this result by 2.

2(151.67 cm2) = 303.34 cm2.

The total area is 303.34 cm2.

There are 48 students in a school play. The ratio of boys to girls is 5 : 7. How many more girls than boys are in the play?

Answers

Answer:

8

Step-by-step explanation:

5+7=12

48/12=4

So 1 in this question is 4.

5*4=20

7*4=28

28-20=8

So 8 is the answer.

Answer: 1


5 times 7 equals 35 and 48 divided by 35 equals 1

22,540 divided by 8= tysm guys

Answers

22540/8=2817.5
I just put it in a calculator lol.
22,540 divided by 8 is 2817.5

#3 is what I need help on

Answers

Answer: 11.05

Step-by-step explanation:

Divide 5.20 by 8 to find the price of each bag (which is .65 cents.) Multiple .65 by 20 (13). 15% of 13 is 1.95. 13 - 1.95 is 11.05

PS: 1.95 is the discount. Hope this helps. Have a good day.

answer is 11.05 and the 1.95 discount

Find the greatest number such that x172y is divisible by 45

Answers

Answer:

45

Step-by-step explanation:

Its 46 dusb dijdudusbs.

The cost of having photos taken includes a sitting fee and $12 for each portrait. The cost of 3, 6, and 9 photos respectively is $51, $87, and $123. What is the sitting fee? Use units in your answer and round answer to the hundredths place, for example $2.35
plz help

Answers

Answer:

The sitting fee is 15 dollars

Step-by-step explanation:

1 - 12 x 3 = 36

2 - 51 - 36 = 15

3 - 12 x 6 = 72

4 - 87 - 72 = 15

Answer:

$15.00

Step-by-step explanation:

cost of photos = sitting fee + $12 per photo

Let the number of photos = x

Let the sitting fee = s

cost of photos = s + 12x

cost of 3 photos = $51

s + 12(3) = 51

s + 36 = 51

s = 15

Answer: The sitting fee is $15.00

find the fraction form
percents-12 1/2,25,37 1/2,50,62 1/2,75,87 1/2

Answers

Answer:

1/8

Step-by-step explanation:

The answer is 1/8 your welcome

Please Help I can’t figure out 4
The question is down below and I would really appreciate the help!

Answers

Answer:

y = 3x

Step-by-step explanation:

from the table slope or rate of change is

m = 6 - 0 / 2 - 0 = 6/2 = 3

m = 12 - 6 / 4 - 2 = 6/2 = 3

m = 18 - 12 / 6 - 4 = 6/2 = 3

so m = 3

y = mx + c

c is y intercept --> y value when x is 0

y = 0 = c

so line equation is y = 3x + 0

y = 3x

Answer:

B, or 3x.

Step-by-step explanation:

When looking at the x value (time), and the y value (distance), you can see that every time you multiply the x value by 3, you get the y value.

2 x 3 = 6

4 x 3 = 12

6 x 3 = 18

Therefore, your answer is 3x.

1
What is the solution to the system of equations? Use any method you prefer to solve.

y=5/4x-2

y= -1/4x+16

a. (12, 13)

b. (-2, 16)

c. (4, 4)

d. (5, -1)

NO LINKS
​

Answers

5/4x-2=-1/4x+16 5/4x+1/4x=18 6/4x=18 x=12 y=13 choose a. (12,13)
B is the answer to this

200 x 40 x 43 - 54 - 20 + 95 -23 =

If u get this i will give u a crown

Answers

Answer:

343,998

Step-by-step explanation:

Hope this helps!! :))

Answer:

343998

Step-by-step explanation:

200*40*43-54-20+95-23

8000*43-74+72

344000-2

343998

note:

were there parentheses?

help plesssssssssssssssssssssssssssssss

Answers

Answer:

(d) 12

Step-by-step explanation:

Answer:

the answer is D

Step-by-step explanation:

Click to see the pic! PLEASE NO LINKS, I CANT EVEN OPEN THEM FOR SOME REASON BUT I NEED AN ANSWER

Answers

Answer 75%=0.75

7%= 7/100

75/10=other

3/4=0.75%

0.07=7/100

7.5=other

Step-by-step explanation: hope that helps :))

0.75~ 75%. 3/4
7/100~. 7%. 0.07
other~. 7.5%. 75/10

Help please I will give yu brainlyest if it’s correct

Answers

Answer:

Less than 14.05

Step-by-step explanation:

Answer:

Just answering so the other person can get brainliest

Step-by-step explanation:

Solve for x
3/5 (x − 7/10)= −3 1/4
Enter your answer as a mixed number in simplest form.

Answers

Answer:

x = 11(13/14)

Step-by-step explanation:

3/5(x – 7/10) = -31/4

open the bracket:

3/5 * x – 7/10 = -31/4

3/5 * –7x/10 = -31/4

3/5 + 31/4 = 7x/10

(12+155)/20 = 7x/10

167/20 = 7x/10

cross multiply:

140x = 1670

x =1670/140

x = 11(130/140)

x = 11(13/14)

The value of x is 1/5.

What is Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given:

3/5 (x − 7/10)= −3 1/4

Now, Solving for x

3/5 ( x- 7/10 )= 13/4

x- 7/10 = -13/4 x 5/3

x- 7/10 = -65 /12

x= -65/12 + 7/10

x= 24/ 120

x= 1/5

hence, the value of x is 1/5.

Learn more about equation here:

https://brainly.com/question/29657983

#SPJ2

In your own words, explain to me what is absolute value? Make sure to talk about the definition of it, how you find it, and how it's different from just plotting an integer on a number line. You must provide 3 sentences or more.

Answers

Answer:

It's a function that associates a real number x with a positive real number using the flowing definition: If the number is not negative (so either positive or 0) the absolute value is x. If x is negative, the absolute value is -x.

This means that to find the absolute value of x you must first determine if x is negative or not, and if it is, multiply it by -1. If it isn't, leave it as it is.

Since the absolute value is a function (of a given number), you can't just plot that number in the number line but the function (so in this case absolute value must be taken first.

The absolute value of x is never negative, so given the absolute value of x we can't determinate if x was positive or negative (if x =/ 0) before the absolute value was taken.

will giver brainliest to the person with the most detailed answer. That means tell me how you got ur answer. And the person who answers with the most clear explanation as well. Good luck!! This is due in 8 minutes as well. And pls number ur answers in order so it is clear!!

Answers

since they are all in the same line you only need to use 2 of the points I'm using (1,-1) and (2,1) next you do (x1,y1) and (x2, y2) which would be (1,2) and (-1, 1) then do y2-y1 / x2-x1 which would be 1/2

Gena wants to estimate the quotient of –21.87 divided by 4.79. Which expression shows the estimate using front-end estimation?
-21 ÷ 4
-21 ÷ 5
-20 ÷ 4
-20 ÷ 5

Answers

Answer:

-21/5 = -5.25 or -5

Step-by-step explanation:

It is so because I estimated the -21.87 to -21 because of the 8 being higher than five. I estimated the 4 to 5 because of the 7 being higher than five also.

-5.25
-4.2
-5
-4
This is how we solve this problem

Explain, how to evaluate cube root from given volume and square root from given area?

Answers

Step-by-step explanation:

Well, the cube root of a cubes volume is its edge length. So, for example, if a cube has a volume of 27 cm³, then the length of its edges are equal to the cube root of 27 cm³, which is 3 cm

Ill give brainless if you get right

Answers

2.4x+9.6x=180
12x=180
x=15
9x=135°
0.1x= 1.5°
0.6x= 9°
9x+0.6x=9.6x
135°+9°=144°

PLS HELP ME! I AM HORRIBLE AT MATH

Answers

Answer:If you need help,get a tutor,Or just ask the question in specific terms and People can help you answer it.And you say you are horrible at math.Don’t say that.you are smarter than you think.you may not be able to do this,But that’s ok.as long as you keep trying & getting help to understand,you’ll be able to master it.don’t worry

Answer:

Simplfiy it down.

Step-by-step explanation:

EX: M= 2/1 or 2. I really hope this helped.

45,747 divided by 9=

Answers

The Answer is 5,083.

Hope this helps!

Answer:

5083

Step-by-step explanation:

Determine the Prime factorization of each number.
36 b. 120 c. 258 d. 63

Answers

Answer:

36

Step-by-step explanation:

It would be the first one right...?

Answers

Answer:

I say the second one but I could be wrong..

The answer is the second one

Lilly wants to plant grass around their rectangular garden they have 28 meters of grass to go around the garden and they need to use it all pick two different dimensions in which they can do to construct the garden here are the choices you can pick 9x10 2x12 10x11 dimension 2 10x4 13x7 51x14 what garden size should Lilly choose if they want to grow the greatest amount of Brussel sprouts dimension 1 or dimension 2

Answers

Answer:

the amount is24

Step-by-step explanation:

The amount is 24.!.!.!.!.

what is 78x85x99x1 i need helppp

Answers

Answer:

656370

Step-by-step explanation:

pa brainliest

Answer:

65630

Step-by-step explanation:

calculator

Hey, can u help, answer right please. NO LINKS!

Answers

Answer:

1,-4 that would be right then 4 down, 4,-1 would be 4 to the right then one down, -1,4 would be one to the left and four up

Step-by-step explanation:

X is horizontal so if its negative you got left but if its positive you go right

Y axis is vertical so negative is down and positive is up.

I hope this helps you!

Help plsssssssssssssss

Answers

Answer:

For question 20.

Pamela: y = 20h

y = 20(40)= $800

John: y = 65p

y = 65(11)= $675

And for question 21.

660,000*63%=660,000*0.63=415,800

There are currently 415,800 gallons of water in the pool.

Step-by-step explanation:

Btw, Underlined numbers are the answers!

Hope it helps! <3

Answer:

Step-by-step explanation:

I NEED HELP TMR IS THE LAST DAY TO TURN THIS IN

Answers

Answer:

9. the yellow bag

Step-by-step explanation:

Green bag=2.59/7=0.37Blue bag=4.56/12=0.38Yellow bag=6.30/18=0.35

0.35<0.37<0.38

I am only gonna help with this one cus I also have homework~sorry!!

For #9 the 18 ounce packet has the lowest cost per ounce
I know this because for the 7 ounce packet it is $0.37 per ounce, for the 12 ounce packet it is $0.38 per ounce and for the 18 ounce packet it is $0.35 ounce a packet. So the lowest is the 18 ounce packet.
I hope this helped.

what is 16,524 rounded down to the preceding thousand

Answers

Rounded DOWN to the nearest thousand is 16000
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