Mathematics Middle School

pleace is math of 8th

Answers

Answer 1

Answer:

x = 8

Step-by-step explanation:

1/2 x - 2x = -5 -7

(1-4)/2 x = -12

-3/2 x = -12

3/2 x = 12

x = 12 · 2/3

x = 4 · 2

x = 8

Answer 2

Pretty sure the answer is x=8

Related Questions

Find the value of 3/4 of 2/5 of a century.

Answers

Answer:

a century = 100 years.

3/4 x 100 years = 75 years.

2/5 x 100 years = 40 years.

3/4 75 years 2/5 is 40 hope this helps

Ellen Recorded the weights rounded to the nearest pound of the pumpkins at the schools pumpkin contest as shown below
26,17,9,12,18,21,9,14,18,23,15,7,20,18,17,12
What is the mode of these weights
A.16
B.17
C.18
D.19

Answers

Mode is the number that appears the most. In this case, 18 appears the most, so the answer is C

The answer is
C - 18

11. A scuba diver's elevation changed by -123 feet every minute. This was
1½ times the rate of change for a second scuba diver. What was the rate of
change in elevation of the second scuba diver in feet per minute?

Answers

Answer:

The rate of change in elevation for the second scuba diver is -82 feet per minute.

Step-by-step explanation:

-123 feet every minute.

1.5x more than 2nd diver.

-123/1.5 = 2nd diver rate

2nd diver rate = -82

The rate of change in elevation of the second scuba diver in feet per minute is -82 feet per second.

Given that, a scuba diver's elevation changed by -123 feet every minute.

What is constant rate of change?

When something has a constant rate of change, one quantity changes in relation to the other. For example, for every half hour the pigeon flies, he can cover a distance of 25 miles. We can write this constant rate as a ratio. For ratios, it's always a good idea to state both units in whole terms.

1½=1.5 times the rate of change for a second scuba diver

Now, rate of change in elevation of the second scuba diver

= -123/1.5

= -82 feet per second

Hence, the rate of change in elevation of the second scuba diver in feet per minute is -82 feet per second.

To learn more about the constant rate of change visit:

https://brainly.com/question/13448675.

#SPJ2

Pls help! Will give brainliest!!

Answers

Considering area (A) of garden as 30 square feet:

30 = x(2x+7)

Now we need to expand it:

x(2x+7) = 2x^2 + 7x

2x^2 + 7x = 30

Adding this into an Algebra calculator gives us 5/2 or 2.5

So x = 2.5

To prove this:

2(2.5) + 7 = 12

14 * 2.5 = 30

Since the area is equal to length times width, and you know your area has to be 30, you can plug in your values like this:

(2x+7) x = 30

you can distribute to make this easier

2x^2 + 7x = 30

you can plug this into quadratic formula by setting the equation =0, so:

2x^2 +7x -30 = 0

where 2x^2 = a
7x = b
and -30 = c

you can plug this into your calculator and get an answer of

X = 2.5

Louis and charlene have $40. Charlene has $15 more than Louis. How much money does Charlene have?

Answers

Charlene has $55

Step-by-step explanation:

40+15 = 55

Select all of the expressions that are equivalent to 4(5x + 2y).
A. 9x + 6y
B. 4,5x) + 4(2y)
C. 20x + 8y
D. 20x + 2y
E. 4(7xy)
put an example for brainliest

Answers

The answer is c

4 x by 5y is 20x that 4 x by 2 is 8y soo...

The answer is c

A. Incorrect
B. Incorrect
C. Correct
D. Incorrect
E. Incorrect
C. 20x + 8y is the correct answer because the parentheses indicate that you would need to multiply. Using the distributive property, you would multiply 4 by 5x which is 20x and 4 by 2y which is 8y. So, your answer is C. 20x + 8y

A cylindrical swimming pool has a diameter of 16 feet and a height of 3 feet. How many gallons of water can the pool contain? Round your answer to the nearest whole number. (1 ft3 ≈ 7.5 gal)

Answers

A cylindrical swimming pool has a diameter of 16 feet and a height of 3 feet. How many gallons of water can the pool contain? Round your answer to the nearest whole number. (1 ft3 ≈ 7.5 gal)

Answer: 6029 gal

6029 gal have a good day

What is the y-intercept of the line y = \frac{3}{4}x
4

3
x + 2?

Answers

Answer:

u typed it wrong i can help u doe type it right

Step-by-step explanation:

pretty sure it’s 2 but not definite

An image of a rhombus is shown.

a rhombus with a base of 18 centimeters and a height of 15.5 centimeters

What is the area of the rhombus?

16.75 cm2
33.5 cm2
139.5 cm2
279 cm2

Answers

Answer:279 cm²Step-by-step explanation:

Formula used,

Area of rhombus = Base × height

Substituting the values,

$ \longrightarrow$Area = 18 × 15.5

$ \longrightarrow$ Area = 279 cm²

Therefore, 279 cm² is the area of the rhombus .

Answer:

D) 279 cm²

Step-by-step explanation:

Area of a rhombus formula:
$A=bh$

This formula is also used for squares and rectangles.

So, we can substitute in our values such as:

A=(18)(15.5)

simplify

A=279

Now, add our label and units:

A=279 cm²

Hope this helps! :)

Can someone please help

Answers

Answer:

I think the answer is c

Step-by-step explanation:

Sorry if i am wrong, also pleas give me Brainliest

It’s a. 5/4n-3/8 you can look this up. A. No b no c no d a

5/6x + 2/3x + = 7
x=

Answers

Use cymath.com for sure.

When I typed your question there it said the simplified answer was, x = 0

5\6x+2\3x=7

Answer is x=0

Scientists are preparing two satellites to be launched. The satellite, Space Explorer B, flies 79200 miles in 18 hours. The graph below represents the number of miles,

Answers

Answer:

4400

Step-by-step explanation:

I think this is right sorry if its not. Have a good night, sorry if im late.

Answer:

4600 miles

Step-by-step explanation:

You want to know the difference in miles per hour between a satellite traveling 45000 miles in 5 hours and one traveling 79200 miles in 18 hours.

Miles per hour

The speed in miles per hour is the ratio of miles to corresponding hours. The difference in miles traveled in one hour will be ...

A speed - B speed

45000 mi/(5 h) - 79200 mi/(18 h) = 4600 mi/h

Explorer B travels 4600 fewer miles in an hour than Explorer A.

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helppppppppppppppppppppppppppppppppppppp

Answers

answer: Forcing states to provide troops

Step-by-step explanation: The committee that wrote the article created a central government that could organize the war. However, the committee did not trust an overly powerful government, so they did not give the power to enforce

I need to get the right for my grade so please help me

Answers

the answer to your question would have to be 3060

pls help will mark brainliest

Answers

Answer:

Answer and

Step-by-step explanation:

equation are attached

You gotta play Baldi’s basics

Can someone pls help me with this first right answer gets brainlist

Answers

116.

116.
you add the m<1 and the m<3 and make them equal to 180. the value of x can then be substituted into the m<3 making the answer 116.

i believe the answer is 116.2

AS ALWAYS, DUE TODAY! Pls and thanks. NOTE- Legit answers only! Legit answers= Brainliest, 5.0 stars, and a Thanks.

Answers

Answer:

x=105 and y=190

Step-by-step explanation:

4x+1y=610, and x+y=295 ; x= 105 and y=190

Answer:

x=105 and y=190

105 big bags of popcorn and 190 small bags of Popcorn

Step-by-step explanation:

4x+1y=610, and x+y=295 ; x= 105 and y=190

Solve this addition question by substituting numbers for the given letters to find the value of START. Each letter represents a unique digit.

JOAN+CAN=START

Answers

Solved the given question by addition rules and the value of START is 10430.

Given-

The given problem is from the alphabetical puzzle. In the given problem the equation given is,

JOHN + CAN = START.

It can be written as,

J O H N

+ C A N

__________

S T A R T

__________

S must be 1, because, even if we assume all the missing digit are 9 ( the largest possible value), the sum will be smaller than than 10999 or equal to the 10998.

Similarly the value of T must be 0 because, even if we assume all the missing digit are 9 ( the largest possible value), the sum will be smaller than than 10999 or equal to the 10998.

Now as the T is two times in the solution of addition, and the value of T is 0 as we found. But T is the addition of N and N. Hence N must be 5 to make the addition 10 for the 0 value of the T.

+ N

____

1 0

____

J must be 9 with carried 1 to make the T 0.

A must be more than 10 to have a carry on J. A can not 1 as S has 1 digit. 2 and 3 disturbs the equation. Thus a must be 4. and for this o and c must be 6 and 7.

If a is 4 than the H and R must be 8 and 3.

The sum will look like,

9 6 8 5

+ 7 4 5

________

1 0 4 3 0

_________

Hence, solved the given question by addition rules and the value of START is 10430.

For more about the addition follow the link below-

https://brainly.com/question/1709448

Which of the h-values satisfy the following inequality?
ん
6
2
Choose all answers that apply:
A
h = 12
B )
h = 14
h = 16

Answers

Answer:

Step-by-step explanation:

The answer I got for this question was 12

A group of seventh graders and a group of teachers at a local middle school were asked how many siblings they each have. The dot plots below show the results. Students A dot plot titled Students. A number line going from 0 to 9 labeled number of siblings. There are 2 dots above 0, 4 above 1, 7 above 2, 5 above 3, 2 above 4, and 0 above 5, 6, 7, 8, and 9. Teachers A dot plot titled Teachers. A number line going from 0 to 9 labeled Number of siblings. There is 1 dot above 0, 3 dots above 1, 2 above 2, 4 above 3, 5 above 4, 3 above 5, 1 above 6, 0 above 7, 1 above 8, and 0 above 9. When comparing the shape of the two sets of data, what conclusion can someone draw? The students tend to have fewer siblings than the teachers. The teachers tend to have fewer siblings than the students. Both the students and the teachers have a wide range of siblings. Both sets of data have the same shape. the answer is- a. The students tend to have fewer siblings than the teachers.

Answers

Answer:

A. The students tend to have fewer siblings than the teachers.

Step-by-step explanation:

First we need to draw the dot plots correctly. If you count both sides they have 20 each.

Now, clearly none have fewer nobody here yet has more or less but going on to the next step.

Multiply exactly the number of siblings times how many people chose that many siblings. Ex: 2 (siblings) times 7 (people who has 2 siblings) = 14. And so on.

On the Student A, we get a total of 41 people having sibling, if you count the 0's then there were a total of 43 people. But now on the Teacher's A Dot Plot, we have a total of 68 people, if you include the 0 then we have a total of 69.

So the answer is A. The students tend to have fewer siblings than the teachers.

Answer:

The sum is A

Step-by-step explanation:

Just ma duty to help the community

a1. What is the longest poster you could fit in the box?
a2. The longest poster you could fit in the box is __ ft?
b. Explain why you can fit only one maximum-length poster in the box, but you can fit multiple -foot posters in the same box.

Answers

Answer:

the longest is 3.2 ft

Step-by-step explanation:

if it is any bigger it would not fit, hope this helps

the longest is 3.2 feet, if it was any bigger it would not be able to fit.

Find x and y. pls help

Answers

Answer:

y = 21

x = 8

Step-by-step explanation:

AB = 180

27 + 3y = 90°

-27 -27

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

3y = 63

÷3 ÷3

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

y = 21

x + 27 + 3y + 8x + 18 = 180

9x + 45 + 3(21) = 180

9x + 45 + 63 = 180

9x + 108 = 180

-108 -108

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

9x = 72

÷9 ÷9

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

x = 8

I hope this helps!

Y = 21
X = 8

We can figure out Y by finding the right angle. A right angle is 90 degrees so we start out with:
90-27
Then,
63/3
21.
Do the same for X to get 8

i made this line graph by measuring a cardboard box yesterday. can someone write 2-3 sentences about what you understood from this graph?
will give brainliest!

Answers

Answer:

As the time went by the shadow got smaller untill it hit three pm and 4pm. The reason the box shadow did not change over the time period of 4pm and 7pm is because at night there is no chance of light hitting around the box because from this graph I can see that the sun was goung down by 3pm. In conclusion the graph below shows when the sun was up and when the sun went down.

Step-by-step explanation:

Brett's music teacher spent $134.30 on 17 song books.what is the cost per book?
A 7.90
B 7.30
C 17.30
D 17.90

Answers

Answer:

7.9

Step-by-step explanation:

The answer is A. 7.90 per song book

HELP ASAP
The interior angles formed by the sides of a quadrilateral have measures that sum to 360°.

What is the value of x?

Enter your answer in the box.

Answers

Answer: x= 34

Step-by-step explanation:

Given: The measurement of the angles of the quadrilateral are as

First angle=88°

Second angle=108°

Third angle= 2x°

Forth angle =(3x-6)°

Now, The interior angles formed by the sides of a quadrilateral have measures that sum to 360°.

Therefore,

Answer: x=59

Step-by-step explanation: first you would do (2x+3)×2+2x=360°

Which simplifies to 6x+6=360°

then solve to get x=59°

then substitute the x=59°

Which will then add up to 360°

A scale drawing of a living room is shown below:

A rectangle is shown. The length of the rectangle is labeled 3 inches. The width of the rectangle is labeled 5.5 inches. The scale is 1 to 30.

What is the area of the actual living room in square feet? Round your answer to the nearest whole number.

17 ft2

41 ft2

495 ft2

103 ft2

Answers

103 is the correct answer for this question hope I helped

Multiply the pairs of numbers and match them with their products. Tiles (-5)(4.2) (-7)(-3) (4) (5) (2.5)(-9) Pairs 22.5 21 -22.5 -21 111

Answers

Here are the pairs matched with their products:

- (-5)(4.2) matches with -21

- (-7)(-3) matches with 21

- (2.5)(-9) matches with -22.5

Pairs (4) and (5) do not have corresponding products in the given options.

The products of the given pairs of numbers are:

(-5)(4.2) = -21

(-7)(-3) = 21

(4)(5) = 20

(2.5)(-9) = -22.5

So, the pairs of numbers and their products are as follows:

(-5)(4.2) = -21 matches with -21.

(-7)(-3) = 21 matches with 21.

(4)(5) = 20 matches with 20.

(2.5)(-9) = -22.5 matches with -22.5.

I hope this helps!

(Pt 1:) What is the angle of BEC?
A- 96
B- 84
C- 20
D- 160

(Pt 2:) What is the angle of BEF?
A- 96
B- 84
C- 20
D- 160

Answers

Answer:

part a is 20° anc part b is 84

I think

Part 1: C-20
Part 2: D-160

The ice-cream shop has the following tree diagram to show the customers the
possible combinations of ice creams they sell. Justify your answer.

Answers

That answer is 18 because you need to count the different diagrams

The answer would be 18 you would add all the ice cream together

w/6 +5/8=−1 3/8
Find w pls
Might give Brainliest

Answers

Answer:

w=-27/2

Step-by-step explanation:

Answer:

w = 4.5

Step-by-step explanation:

w/6 +5/8=−1 3/8

w/6 +5/8=−11/8

4w+15/24 = −11/8

4w+15 = 24(−11/8)

4w+15 = -264/8

4w+15 = 33

4w = 33 - 15

4w = 18

w =18/4

w = 4.5

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