Mathematics Middle School

Simplify 4a – 7b + 2ab – a + b.
Group of answer choices

15ab

4a – 7b + 2ab

3a – 6b + 2ab

-ab

Answers

Answer 1

Answer:

3a - 6b + 2ab

Step-by-step explanation:

We can group the a's and b's like this:

4a - 7b + 2ab - a + b

4a - a - 7b + b + 2ab

3a - 6b + 2ab

Answer 2

Answer:

- ab and 15ab

Step-by-step explanation:

Related Questions

I dont get- this thing .-.

Answers

Answer:

It would be #2

Step-by-step explanation

It’s number two babes

I NEED biggggggg brain helpers XD

Answers

Answer:-18x^5y^{6z+2}

Step-by-step explanation:

dont feel like explaining

An equation is shown. What is the value of 12x that makes the equation true?


12x + 4x = 15/2 + 4x

pls halp

Answers

Answer:

x = 5/8

Step-by-step explanation:

READ THE THING UwU uhm yeah thats all

Answers

Answer:

do u want me to solve it??

Step-by-step explanation:

She didn’t align the decimals correctly when she subtracted. The correct answer is 15.457 .

PLz help btw it all in the question

Answers

Answer:

a - a

b - b

c - b

d - a

Step-by-step explanation:

Answer:

A goes to diagram A

B goes to diagram B

C goes to diagram B

D goes to diagram A

Question Help;

Sheldon can read 8 pages in 15 minutes. Amy can read 16 pages in 1 hour. Explain how you could use a table or graph to find how much longer it would take Amy to read a 320​-page book than Sheldon.

Answers

Answer:

First you must convert time to the same units.

8pages/15min= 32pages/1 hr

now you can clearly see the ratio

Amy: 16/hr

Sheldon: 32/hr

We can see that Sheldon reads twice as fast as Amy.

This should be a good starting point, sorry I don't have much time to finish this question. Hope this helps good luck!

Amy 16hr Sheldon 8hrs

The spinner is spun 48 times. What is a reasonable prediction of landing on the letter E?

Answers

Answer:

because that is the right amount of times you spun it

Step-by-step explanation:

Marie and her family are on a trip. So far, they have traveled 175 miles and are 25% of the way to their destination. How many total miles will they travel?

44 miles
700 miles
200 miles
875 miles

Answers

Answer:

44

Step-by-step explanation:

We need to divide 175 by 4 since we the percentage is 25%. If you divide, the answer is going to be roughly 44 miles.

The spinner is spun 240 times. What is a reasonable prediction
of it landing on a number less than 3?

Answers

Answer:

60 times

Step-by-step explanation:

2/8 pieces of the circle are less than three

2/8 = 25% chance of landing less than 3

240 * 25% = 60

I will mark the best answer

Answers

Answer: N = 10

Step-by-step explanation:

-(n - 8) = -2

Distrubute

-n + 8 = -2

Minus 8 from both side

-n = -10

Divide both side by -1 to make it positive

N = 10

I love dogsssssss and if you think cats are better then don’t talk to me <3 jk I like cats too

HELPPP!!!!
im not really good at math
im coming for help pleaseeee!!!!
pleaseee be kind and help

Answers

Answer:

1) no

2) no

3) yes

4) yes

5) no

6) no

Step-by-step explanation:

Answer and Step-by-step explanation:

1) No. 5m and 3a do not have any common factors.

2) Yes. They have a common factor of 2. So, it could be combined as 2(2 + 2y).

3) Yes. They have a common factor of 2x. So, it could be combined as 2x(4 - 1).

4). Yes. They have a common factor of 5. So, it could be combined as 5(3 + 2).

5). Yes. They have a common factor of t². So, it could be combined as t²(7 + 9t³).

6. Yes. They have a common factor of 3. So, it could be combined as 3(y³ + x⁶).

Hope this helped! <3

please answer right ill give brainliest

Answers

Answer:

20 songs

Step-by-step explanation:

she starts with 20 songs at beginning of year

Use substitution to find the ordered pair of the following system of equations:

y=6x
y=5x+7
(_,_)

Answers

Answer:

first substitute 'y' in 2nd equation by right side of 1st one and you get:

now substract 5x from both sides of 2nd equal and you get:

as a result of the equal above you get:

now substitute x in very first equation by the result from above (x=7):

Step-by-step explanation:

sorry if its wrong

6x = 5x + 7
-5x -5x
——————
x = 7
y = 6x
y = 6(7) = 42

Your answer: (7, 42)

Jada's brother drives 18 miles to work and then a quarter of that distance again. How far does Jada's brother drive?

Answers

18+4.5

A quarter of eighteen is 4.5

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family? (This is actually math)

Answers

Answer:

their are 4 sisters and 3 bothers

Hello, I would really like some help on this!! Please leave an explanation of how you got your answer! Thank You!

Answers

1a) To find the total area, you must find the area of the triangular part that is missing, then subtract this from the area of the rectangle. For the triangle’s area, you need to know the width (2m) and length (2m). For the rectangle’s area you need to know the width (3m) and length (4m).
1b) the total area is 10m^2 (10 meters squared). This is found by subtracting the triangle (.5x2x2=2) from the rectangle (3x4=12).
I don’t know how to answer this question sorry. I’m just answering so the other person can get brainliest.

After a power failure, the temperature in a freezer Increased at an average rate of 3.5 °F per hour. The total Increase was 24.5 °F. Enter and solve an equation to find the number of hours until the power was restored. Let x represent the number of hours it takes for the temperature to increase to 24.5 °F.


The equation to find the number of hours until the power was restored is ____x = _____


The number of hours until the power was restored is ______ hours.

<Please fill in the blanks I will give you brainliest if you answer correctly>​

Answers

Answer:

3.5x=24.5

3.5x7=24.5

X=7

Step-by-step explanation:

3.5 times what equals 24.5

3.5x1=3.5

3.5x2=7

3.5x3=10.5

Keep doing this and increase the number you are multiplying 3.5 by until your answer is 24.5.

on the left side of the triangle, it says 10 cm, on the right side of the triangle, it says 18 cm, below the triangle, it says 15 cm. find the area of the triangle and answer this question is square cm.

Answers

Area formula for a triangle is 1/2BxH

B=15
H=10

1/2(15)= 7.5

7.5 x 10= 75

So the area is 75 square cm :)

Find the amount of sales tax if the sales tax rate is 5% and the cost of the winter coat is $40. Hint: this question is only asking for the sales tax.

Answers

Answer:

40/100*105 = 42

42 - 40 = 2

$2 sales tax

if giselle had five books sets and gave 9 books away and has 26 left how many were in the bookset

Answers

Answer:

7 in each book set

Step-by-step explanation:

26+9= 35 (total # of books)

35/5= 7 ( # of books in a book set)

26 + 9 = 35
35 / 5 = 7
So the answer is 7 books per book set!
Hope it helps

HELP PLZ I WILL GIVE BRAINLIEST!! Write the prime factorization of 280 using exponents.

Answers

the answer is 2(3) x 5(1) x 7(1)

Answer: 16? Don't trust me.

Step-by-step explanation:

(3 + 1)(1 + 1)(1 + 1) = 4 x 2 x 2 = 16

what is 3(x + 3) equal to

Answers

3x + 9 if you don’t know what x equals.

Answer:

3x+9

Step-by-step explanation:

The publisher chooses to have front and back covers
with a thickness of
of an 1/3 inch instead.
Write an equation that represents the NEW total width of the book, y, for every 100 pages of paper, x.

Answers

I’m sorry I don’t really know how to answer this but Ik someone who can

Find the sales tax....

Answers

Answer:8.75

Step-by-step explanation:

I need to find the area, what is it?

Answers

1.5 inches

The formula is (base x hight) divided by 2

(repost) Help Please!! I will give Brainliest!!

Answers

3x10^10 cubic feet if you need the work let me know
3x10^10 is the correct answer

look at the diagram and answer the question. i’ll give brainliest.

Answers

Whoever worded question made tha shi so confusing

Answer:

Yes

Step-by-step explanation:

With each hour you rent the paddleboard the price goes up.

Time= independent variable

Cost= Dependent variable

i+5 < 3u+5
subtract 5 from each side
what do we have left

Answers

Answer:

i+2<3u+2 is the answer for your question.

20 points each!!! Heather has 2 less than 5 times the amount of shoes that Donna has, Gina has 1 more than 2 times
amount of shoes that Donna has. Let x represents how many shoe Donna has.

a. Write an expression that represents how many more pairs of shoes Heather has than Gina.

b. Simplify the expression:

c. How many more pairs of shoes does Heather have is Donna has 14 pairs of shoes?

Answers

Answer:

A. (5x - 2) - (2x +1)

B.  x -1

C. 68

Step-by-step explanation:

Heather = 5 times Donna -2   H = 5D - 2

Gina = 2 times  Donna + 1    G = 2D + 1

Plug in D for X and you get

H = 5x -2

G = 2x + 1

If Heather's expression is 5x -2 and Gina's expression is 2x + 1 then to show how many more Heather has than Gina. You have to subtract Gina from Heather.

(5x - 2) - (2x +1)

Now to simplify it, you just combine all the like terms.

5x - 2 - 2x -1 = 3x - 3   and then you can simply this further by dividing all terms by 3.    x - 1

To solve how many Heather has if Donna has 14. You substitute 14 for x in Heather's equation.    5 (14) -2  =  70 - 2 = 68

Part D
Finally, use decimal numbers to write an expression that represents the net change in Rylee’s bank account balance for her entire shopping trip. Use your answers from parts A through C to guide you.


PART C; The original price of Rylee’s groceries was $23.50. This money is leaving her bank account, so represent the amount with a negative sign:
-$23.50.

Rylee got a 20% discount on her purchase. In other words, she got 20% of her money back. The expression that represents the net change in her bank account is
-$23.50 – (-$23.50 × 0.2).

Further simplify the expression by factoring -$23.50 from both terms:

-$23.50 – (-$23.50 × 0.2)
=
-$23.50(1 – 0.2)
=
-$23.50(0.8).

Answers

Answer:

look at explanation

Step-by-step explanation:

PART C; The original price of Rylee’s groceries was $23.50. This money is leaving her bank account, so represent the amount with a negative sign:

-$23.50.

Rylee got a 20% discount on her purchase. In other words, she got 20% of her money back. The expression that represents the net change in her bank account is

-$23.50 – (-$23.50 × 0.2).

Further simplify the expression by factoring -$23.50 from both terms:

-$23.50 – (-$23.50 × 0.2)

=

-$23.50(1 – 0.2)

=

-$23.50(0.8).

The net change to her banking account balance is $83.22.

What is net change?

The net change theorem states that when a quantity changes, the final value equals the initial value plus the integral of the rate of change. Net change can be a positive number, a negative number, or zero.

Given that, She spent $36.50 plus 8% tax.  (to calculate the tax amount, we have to multiply the cost by the percentage in decimal form)

36.50 x (8/100) =$2.92 (value of tax)

Adding to the original cost

36.50+2.92 = $39.42

Then, she spent $25 to refuel her car at the gas station.

39.42 +25 = $64.42

She bought groceries worth $23.50. At the grocery checkout, she handed over a coupon for a 20% discount on her purchase

23.50 x (20/100) = 4.7 (amount of discount)

Subtracting to the purchase

23.50 -4.7= $18.8

Hence, adding to the total cost.

64.42 +18.8 = $83.22

For more references on net change, click;

https://brainly.com/question/14158501

#SPJ2

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