Mathematics Middle School

Simplify the expression:
–2b + 7 – 2a + 5b – 6a

A.) –8a+ 3b +7
B.) 8a – 3b + 7
C.) –4a + 7b + 7
D.) 4a – 3b + 7

Answers

Answer 1

Answer:

-8a + 3b +7   (Answer A)

Step-by-step explanation:

Let's take all the like terms and put them together!

There's:

-2b and 5b

-6a and -2a

7

Let' add all of them to each other!

-2b + 5b is 3b

-6a + -2a is -8a

7 remains 7

Since a is the first letter of the alphabet, we would order it in alphabetical order.

-8a + 3b +7

The answer is A

Answer 2
the answer is b you just have to collect like terms

Related Questions

a marching band has 4 rows of trumpeters with 10 trumpeters in each row. how many trumpeters are in the marching band? use the distributive property to solve.

Answers

Answer:

40

Step-by-step explanation:

4 × 10 = 40

hope this helps...

This answer is 40 if u multiply

Math, must show work

Answers

Answer:No.

amount of paint needed for 1 coat = 750 ml

amount for 3 coats = 750 ml * 3 = 2250 ml

                                             =2.25 litre

hence we've 0.25 litre less

Step-by-step explanation: hope this helps

Answer:

3.25

Step-by-step explanation:

First, you need to divide 13 by 4, = 3.25

Then draw a cube, label each side wall 1 wall 2, ect.

Color in each wall the same color (if you want too don't have too, just adds more to the diagram.)

Hope this helps! <3

I'm pretty sure its B but I just need reinsurance

Answers

Answer:

i think it might be B

plz correct me if im wrong

Step-by-step explanation:

it’s b

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

Which graph represents the function f (x) = 8 Superscript one-third x?

edge 2020

Answers

0,8 is the answer in the problem.

Answer:

B

Step-by-step explanation:

Got it right on Edge 2020-21. Hope this helps you, have a great day!

Use the distributive property to write the products in Standard Form
A. 3(2x - 1)
B. 10(b + 4c)
C.9 (g - 5h)
D. 7 (4m - 5m - 2)
E. A(b + c + 1)
F. (8j - 3l + 9)6

Answers

A. 6x-3
B. 40c + 10b
C. 9g - 45h
D. -7m - 14
E. Ab + Ac + 1A
F. -132 + 48j
6x+3
40c+10b
9g-45h
-7m-14
Ab+ac+1a
-132+48j

can some one help me i have no idea how to do this

Answers

Answer:

k=-7

Step-by-step explanation:

Okay,

2/7k-3/8=-19/8

       +3/8 +3/8

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

   2/7k=   -2

   -------    -------

     2/7       2/7

k=-7

To check do 2/7(-7) -3/8

                         -2 -3/8

and u get -2 3/8 but then u do 8*2= -16+3= 19

Bella wants to buy a new laptop because hers broke. Best Buy is having a double discount sale. The computer originally costs $830 and there is a 40% discount and then another 40% discount. How much will Bella pay for the laptop

Answers

answer: $298.80

there’s 2 ways to do this:
1. First Discount:
40% of 830 = .40 * 830= 332
830 - 332 = 498
Second Discount:
40% of 498 = .40 * 498 = 199.20
498 - 199.20 = 298.80

2. First Discount
100-40 = 60% (you’re paying 60% of the price)
60% * 830 = .60 * 830 = 498
Second Discount
60% * 498 = .60 * 498 = 298.80
^you’re paying 60% of discounted price

find the equation of a line which has a slope of -9 and crosses the y axis at -7


(BRAINLIEST +10pts!!!)

Answers

Answer: y=-9x-7

Step-by-step explanation:

The formula  to write an equation in slope intercept  form is y=mx+b.

m is the slope, b is the y intercept.

m= -9

b= -7

y= -9x+-7, which simplifies to

y= -9x-7

Hope this helps :)) Also if i could get brainliiest id really appreciate it thanks! :D

Please help will give brainly

Answers

Answer:

the correct answer is 5/24. hope this helps

n an orchard, there are 13 apple trees, 21 orange trees, and a cherry tree. What is the ratio of orange trees to cherry trees?

Answers

Answer:

21 : 1

Step-by-step explanation:

1. What is the approximate world population? There are 7.674 billion people on earth.
2. What is the approximate world refugee population? 3.6 million

3. What percent of the world population consists of refugees? Round your answer to the nearest tenth.

4. Roughly 3.5 billion people have wealth of less than US $10,000. What percentage of the global population does this represent? Round your answer to the nearest hundredth.

5. Approximately 50% of all refugees are children (under the age of 18). How many refugees are children? Round your answer to the nearest whole number

Answers

Answer:

?????///?//??////?????

Step-by-step explanation:

(1.) 8 billion (2.) 4 million (3.) .30% (4.) — (5.) half of all the refugees

When is the constant of proportionality the same as the unit rate when comparing two quantities?


1 only when the two quantities are indirectly proportional

2 only when the two quantities are directly proportional

3 never

4 always

Answers

Answer: C

Step-by-step explanation: They are never the same

Answer:

only when the two quantities are directly proportional

Step-by-step explanation:

I got it right on my quiz hope this helps!!!

PLEASE PLEASE HELP ME
Jude graphed the inequality s

Answers

Answer:

The graph is correct

Step-by-step explanation:

This is because the graph is representing all values that are less than -9 since the arrow is going to the left from the closed circle -9

the graph is incorrect. < without the like under it should be an open circle because it does not include it

hi i need help please

Answers

Answer:

28

Step-by-step explanation:

16 Ada to eves house

12 Eva to pool

28

28 is the answer hope it help

I need help PLZZZ!!!!

Answers

Answer:

D.

Step-by-step explanation:

Step by step! Explanation!

Solve linear equations by graphing (all of my equations don't have a Y value so do i just place a dot on the X line?)
1) -3x+2=-1
2) x+2=0
3) 4x-2=-2
4) x+2=x-1
5) x+4=3
6) x+1=x-7
7) 13x+2=11x-1
8) -9x-3=-4x-3
9) -x+2=-x+1

Answers

Answer:

yes

Step-by-step explanation:

put a dot on the x line.

I think we need more information on what topic you are on in algebra at the moment. But my best guess would be to solve for x, and then place your answers on the x-axis. This would be questionable though, because you would get many 0=(some number), which would be answered as untrue. Question numbers 4, 6, and 9 would all be untrue. Other than that,
1) x = 1
2) x = -2
3) x = 0
4) 0 = -3 (untrue)
5) x = -1
6) 0 = -8 (untrue)
7) x = -3/2
8) x = 0
9) 0 = -1 (untrue)

Question 1 (1 point)
A trendline passes through the ordered pairs (5, 8) and (7, 18). What is the slope of the trendline?

Question 1 options:

-1/5


5


1/5


-5

uestion 2 (1 point)
A scatterplot shows several points with number of hours watching TV versus weekly wages. The researcher came up with the following equation for the trendline. Weekly wages = -50.755*(hours of TV watched) + 180.

What is the significance of the slope in the context of this model?

Question 2 options:

The more TV someone watches, the more money they will earn.


The more TV someone watches, the less money they will earn.


The amount of TV someone watches does not impact the money they earn. It will stay the same no matter what.

Answers

Answer:

question no 1:slope=5

Step-by-step explanation:

let(x=5andy=8)(a=7andb=18)

now

slope=(b-y)/(a-x)=(18-8)/(7-5)=5

Answer:

answer 1: 5

answer 2: the more tv someone watches the less money they will earn.

also, i think we go to the same school... is this for mr grossmans class lolol

Step-by-step explanation:

Can you help me please.

Answers

The answer is metaphor.

algebra 1 pls ty! Brainilest if correct!

Answers

The answer would be 3

Which equation results from adding the equations in this system? Negative 8 x + 8 y = 8. 3 x minus 8 y = negative 18. 5 x = negative 10 5 x = 26 Negative 5 x = 26 Negative 5 x = negative 10
on edge?

Answers

Answer:

-5x = -10

Step-by-step explanation:

What’s the rate of change for this table? Please explain and show your work.

Answers

^^^ The rate of change would be 3 because all of them could be divided by three. -6/-2 , -3/-1, 6/2 and so on

Please Help ASAP Thank you

Answers

Answer : D
Formula for height is
H = SA / (2 x 3.14 x r) - r
The answer is D. Have a great day

Mr. Hawkins is covering a wall with wallpaper. The wall is a rectangle and measures 14 feet by 12 feet. Each square foot of wallpaper costs $2.90. What is the cost of adding wallpaper to the room? HINT: Find the area of the wall, then use that to determine the cost.
(Please explain your answer)

Answers

Answer:

$487.2

Step-by-step explanation:

you multiply 14 and 12 then you get the answer of 168 and multiply that with $2.90 then you get the answer of $487.2.

Answer:

$487.2

Step-by-Step explanation:

You multiply 14 x 12 and you get 168. Then after you multiply 14 and 12, multiply the 168 with $2.90. Then you get the answer $487.2

Account A has a simple annual interest rate of 2% and Account B has a simple annual interest rate of 2.5%. How much more interest do you earn per year when you deposit x dollars in Account B instead of Account A?

Answers

Account b I’m pretty sure

Answer:

b

Step-by-step explanation:

It is B because I SAID IT IS

Can you please help me decode how they coded the movements? ( Celeste )

Answers

I’m sorry I’m not under stand

Answer:

ok i would love to help

Step-by-step explanation:

but i dont play that......

Case study based question:- Shikha ,Neethu and Fabina are friends .They are very health conscious. They jog daily in the morning. Shikha jogs around a triangular park of dimensions (4ab + 3bc) meters ,(3ab+2bc)meters and (ab - bc) meters. Neetu jogs around a square park of side (2x +3y) meters and Fabina around a rectangular park of dimensions (5m + 2n)metres and (5m - 2n)meters.
i) Find the distance covered by Shikha around the triangular park ?
ii) Find the area of the square park.
iii) Find the area of the rectangular park.

Answers

The answer is B. I had the same quest and got it correct

Answer:

B

Step-by-step explanation:

answers?? im being timed

Answers

Answer:

8x + 3 = 67

Step-by-step explanation:

8(8) + 3 = 67

64 + 3 = 67

Hope this helps!

Definitely 8x + 3 = 67

[tex] = \tt{8x + 3 = 67}[/tex][tex] = \tt{8x + 3 - 3 = 67 - 3}[/tex][tex] = \tt{ 8x = 64}[/tex][tex] = \tt{ \dfrac{8x}{8} = \dfrac{64}{8} }[/tex]

[tex]\green{\boxed{\tt{{x=8}}}}[/tex]

explain how to solve for the missing side from the similar figures given and solve. (do not just give the answer)

Answers

Answer:

x=14

Step-by-step explanation:

Since the triangles are similar, you first line up the sides. Then, because the 16 and the 24 line up together, you divide them to find out how much bigger the first triangle is, which is 3/2 or 1.5. After that, you can see that the 21 and the x are on the same side, so you would divide 21 by 1.5 or 3/2 to get x. 21÷1.5=14.

x=14

Answer: X= 14

Step-by-step explanation: line AC equals 21 and line BC equals 24, i put 24 over 21 like a fraction then i look at the smaller triangle now EF is proportionate too BC so next to the 24 i put 16 and line DF is X so you put X underneath 16 and next too 21. now you cross multiply and divide leaving you with 14 so line DF or X is 14

The frequency table shows the height ,in inches ,of 12 gymnastic.What fraction of the gymnastics are 59 inches or shorter?

Answers

Answer:

can you show the table. .

Help quick show work please

Answers

Answer:

2.2

Step-by-step explanation:

10.5 - 1.7 = 8.8

8.8 = 4h

8.8/4 = 2.2

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