Mathematics Middle School

I need help plz 8th grade math

Answers

Answer 1

Answer:

1.25 percent

2. 25 percent

3. 65 percent

4. no

Related Questions

PWEZ HELP

THis is 3 qwestions worth 10 each plz answer corectly and u get branlyest

1 Describe the two factors in this expression

4(8 + 3x)

2 The surface area of a cone with radius r units and slant height s units is shown below:

Surface area = 3.14(rs + r2)

Part A: If r = 6 units and s = 4 units, write an expression that can be used to calculate the surface area of the cone. (4 points)

Part B: What is the surface area of the cone? Show your work. (6 points)

An expression is shown below:

4(m + 3 + 5m)

Part A: Write two expressions that are equivalent to the given expression. (3 points)

Part B: Show that one of your expressions in Part A is equivalent to the given expression using algebraic properties. Explain which properties you used. (4 points)

Part C: Show that your other expression from Part A is equivalent to the given expression by substituting a number for m. (3 points)

Answers

Answer:

1 Describe the two factors in this expression: 4(8 + 3x)

The 3 factors of 4 are: 1, 2, 4

The factor pairs of 4 are: 1 × 4 = 4 & 2 × 2 = 4

2 The surface area of a cone with radius r units and slant height s units is shown below: Surface area = 3.14(rs + r2)

Part A: If r = 6 units and s = 4 units, write an expression that can be used to calculate the surface area of the cone. (4 points)

πr (l + r)

Part B: What is the surface area of the cone? Show your work. (6 points)

Surface area = 3.14 × 2 (2+3)

= 3.14 × 10 = 314 unit ^2

for the rest just got this guys question:

https://brainly.com/question/22009560

Which relationship is always correct for the angles x, y, and z of triangle ABC? (1 point)

A triangle ABC has angle ABC labeled as y, angle ACB labeled as z, and the exterior angle at A labeled as x.
x + z = y
y + z = x
x + y + z = 180 degrees
x + y + z = 90 degrees

Answers

answer: y + z = x
I think-

X + y + z = 180 degrees

Please help me!

If you were shopping for clothes, would you prefer a store with a 60%-off sale or a half-off sale?

Answers

Step-by-step explanation:

you'd prefer 60% off because 60% is more than half off (half off is only 50% off)

60% off since it’s more then 50%, plus it’s more useful for cheaper items you purchase

The diameter of a bicycle wheel is 26 inches How many feet will the bicycle travel if the wheels turn 20 times? Explain how you got your answer.

Answers

Need to convert mph to rpm. How to do it? See below please.
Explanation:
assume statute mile of 5,280 ft or 1760 yards
(
35
m
p
h
60
)
= miles per minute = 0.583333 miles per minute
Now how many ft in 0.58333 miles?
1 mile is 5 280 ft thus
0.58333mile * 5 280 ft/mile = 3 080ft
Circumference of wheel is C=
π
d
C = 26*
π
C
≈
81.681 inches /12 = 6.807ft/revolution
Now how many times does the wheel rotate in one minute?
3
080
f
t
minute
/ 6.807 ft/revolution = 452.489 rpm

PLS PLS PLS HELP I WILL MARK YOU BRAINLIEST

Answers

if the ● means multiply then the answer is -31.5

-31.5 hope that helps:)

Please help me with this

Answers

Answer:

SeaWolf = 40/100 Nautilus = 100/100

Step-by-step explanation:

Two identical number cubes are shown in the picture below. The edge length of these number cubes is 4 centimeters: What is the combined volume of the 2 dice shown above in cubic centimeters?

Answers

Answer:

d. 128 cm^3

Step-by-step explanation:

to find the volume its length time width times heights; so 4 cm times 4 cm time 4 cm which is 64. Since the dice are the same size you add 64 cm^3 to 64 cm^3 to get 128 cm^3

Is it possible to calculate the percent error if you do not know the exact value? Explain your answer.

Answers

Answer:

I strongly believe that 4129376 (Mark) is correct and deserves brainliest.

Step-by-step explanation:

What is the answer to this question?

Answers

Answer:

negative

Step-by-step explanation:

The answer to your question would be negative

Which is greater
0.7repeating or 3/4

Answers

Answer:

0.7 repeating I believe

Step-by-step explanation:

i'm not sure how i got it, but yea

0.7 cause 3/4 is equivalent to 0.75 which is less

Jon drives at a constant rate of 60 miles per hour. He’s taking a trip and needs to drive 480 miles. Determine how many hours his trip will take him.

Answers

Answer:

8 hours.

Step-by-step explanation:

60x8=480

Hope this helps!

8 hours is how long

Please answer i will give brainlest

Answers

Answer:

here ya go

Step-by-step explanation:

1. 20

2.1793

3. 1943

im noy to sure on the bottom ones but use ctrl f in the notes you use for this or something and type in the "transacted" or something in the question and your answer should pop up

I keep getting this answer wrong and I only have 3 attempts and I have one more left, I need someone to give me the answer an explain what I was doing wrong

Answers

Answer:

Step-by-step explanation:

angle a and b add up to 180 degrees

4x-20+2x+8=180

add like terms

6x+12=180

x=28

then substitute to get 92

Solve the system using substitution. Show your work.
x = -4y + 9
x - y = 4

Answers

Answer:

please what should we found? is it the value of ×or y

x = -4y + 9
x - y = 4

- rearrange the second equation to x = 4 + y
- then we can plug it into x for the first equation

4 + y = -4y + 9 — then we solve for y
y = -4y + 5
5y = 5 -> y = 1

we can then plug in 1 (our y value) into the original second equation.

x - 1 = 4 -> x = 5

x = 5 & y = 1
you should put it in a coordinate layout so:
(5,1)

hope this helped !!

Coach Cliffman made a deposit of $1,800 into an account that earns 2% annual compound interest. Find the amount of interest that Coach Cliffman earned after 3years.

Answers

Answer: 5508$

Step-by-step explanation:

So to find interest your formula is this:

Int=interest rate (percent)*principal

So your problem would be: int=.02*1800

This equals 36. Since its interest, you add your interest (36) and your principal (1800) and get 1836. Now, since you need to find the interest for 3 years, you multiply 1836 by 3.

Step-by-step explanation:

when y’all put he answer can you please put an explanation

Answers

Answer:

what grade r u in this is tough

Step-by-step explanation:

Answer ASAP please and thank you. Please give me the correct answer!! This is very important. I saw this question twice for brainly, they both had different answers.

A. 108
B. 60
C. 72
D. 120

Answers

Answer:

Step-by-step explanation:

18+12=30

30X4=120

120/2=60

You need to add the bottom and the top of the trapezoid, times the height, and divided them by two.

Answer:

60 m^2

Step-by-step explanation:

The area of a trapezoid of lengths a and b is equal to the average length times the width. Here the average length is 30/2 m, or 15 m, and the width is 4 m. Thus the area is (15 m)(4 m) = 60 m^2 (Answer B)

50 points
To graph the point (4, -7) on the coordinate plane, start at the origin. Move 4 units _______ and 7 units ________ .
Answers
a
right.....down
b
left....down

Answers

a. right........down

Answer:

Step-by-step explanation:

right downTo graph the point (4, -7) on the coordinate plane, start at the origin. Move 4 units right and 7 units down .

who ever answers this first will get a brainlest

Answers

Answer:

hello its me shrek (we meet again)

I am in a current state of bankruptcy of points and are now willing to help this company by answering question with my infinite knowledge. After all I am a god.

I am pretty sure its 144%

Step-by-step explanation:

Well since we trying to find the revenue worth 2017’s stuff its basically given and covnert that into a percent is basically

36/25=x/100

Cross multiply to solve this proportion

And then you would get 144 percent

Answer:

Let the 2016 revenue = x

Let the 2017 revenue = y

36/25 * 100 = the percent relationship

% relationship = 144%

y = 144% x

Answer 144%

Justin made a scale drawing of a sailboat he saw at the harbor. The length of the actual boat is 24 feet, and the mast is 20 feet high. In Justin's sketch, the boat is 2 centimeters longer than the mast. What is the length of the boat on his sketch?

Answers

The length of the boat on his sketch is 12 cm

20 points <3
If the problem ask you to find the distance around a circle, which
formula should you use?
A. r = 1/2d
B. C = md
C. d = 2r
D. A = mr

Answers

Answer:

d=2r

Step-by-step explanation:

edge 2020

p.s. pls mark brainliest, and have a good day! :)

C is the correct answer

plsssss helps no other stuff

Answers

jane has the greater median

okay yes i need a lot of help okay

Answers

Answer:

either 78.4cm or 288.4cm

Step-by-step explanation:

rectangle area

A = 15x4

A = 60

Area of 2 triangles

A = 4.6x4/2

A = 9.2x2

A = 18.4

18.4 + 60 = 78.4cm

Maybe the answer

Area of 2 rectangles

A = 15x4

A = 60

A = 15x14

A = 210

Area of 2 triangles

A = 4.6x4/2

A = 9.2x2

A = 18.4

60 + 210 + 18.4 = 288.4cm

either answer hope one is right

Answer:

228.4

Step-by-step explanation:

Both triangle surface:

4x4.6 and then divide by 2 = 9.2

That will be the surface for one triangle

But there are two triangles so we times that by 2

That will be 18.4

Both big rectangle surface: (the top and bottom ones)

15x5=75

But we have two rectangles

So we times that by two and the answer will be =150

Smaller rectangle: (the one between two triangles)

4x15=60

Okay, now we add them all up, the triangles and rectangles

60+150+18.4=228.4

Plz help me i need this done.

i will give 3 extra points if it is correct

Answers

Answer:

the area is less than 8 feet

Step-by-step explanation:

area is L*W

L=8 W=(7/8)

8*(7/8)=7

7<8

It would be area =7<8

Plz help me thank you. 4 cm of the ice tray

Answers

I had to do this and it’s fake, my whole class got it wrong even though we all put the right answer so ya

I don’t know bud I need point so yea

Answer asp giving crown to the first correct

Answers

Answer:

459

Step-by-step explanation:

his mistake was that he put three 5 instead of three 6 and he put six 3's instead of five 3's so it should be …

6x6x6+3x3x3x3x3

216+243

459

A tent in the shape of a triangular prism is made using the following piece of fabric. Find the surface area of the fabric. Explain your reasoning. (PLEASE HELP ME AND PLEASE SHOW YOUR WORK/REASONING)

Answers

Answer:

..............................

Answer:

area = 85.84 ft²

Step-by-step explanation:

large rectangle area = 6 x 12 = 72 ft²

2 triangles area = 2(4 x 3.46 x 0.5) = 13.84 ft²

72 + 13.84 = 85.84 ft²

Please help. I have 17 points so ill only be giving 10.

Answers

The answer is B. (at least i’m pretty sure it is) :))

i’m pretty sure the answer is B, if it’s wrong sorry

oh god i actually need help

Answers

A = 1/2bh

b = 8
h = 5

1/2 x 8 = 4
4 x 5 = 20cm

Hope this helps! :)

Your answer is going to be 20cm actually had this worksheet in my old worksheets folder from a while back and checked the answer and 20cm is correct

Amanda has 227 worth of bills in her purse. she has 6 more $5 dollar bills than $10 bills. The number of $1 bills is three fewer than 25 times the number of $10 dollar bills. How many of each does amanda have?

Answers

I think it’s 20 I hope that works

Answer:

Step-by-step explanation:

x = $5 dollar bills

y = $10 dollar bills

x + y = 15

5x + 10y = 120

5x + 10(15-x) = 120

5x + 150 - 10x = 120

-5x = -30

x = 6, so y = 9

There are six $5 bills and nine $10 bills.

Multiples of 5s will only end with 5 or 0. 5 times any odd number will always end with 5 and 5 times any even number will always end with 0

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