Mathematics Middle School

Simplify the expressions by combining like terms

10r - 5r + 3r - 8r

Answers

Answer 1

Answer:

0

Step-by-step explanation:

Combine like terms, perform the operations with the coefficients of the variable, then write the variable.

10r - 5r + 3r - 8r

= 5r + 3r - 8r

= 8r - 8r

= 0

Answer 2

Answer:

0

Step-by-step explanation:

10r-5r=5r

5r+3r=8r

8r-8r=0

Related Questions

answer this pls asap

Answers

Answer:

351.68 cm^2

Step-by-step explanation:

We need to find the area of the frame itself. the radius of the inner circle is 12, but the frame has a radius of 4. You add 12 and 4 and you get 16. The formula for area of a circle is A=πr^2. So A= 3.14 x16^2. Then you have A= 3.14x 256 and you get 803.84. But we only want the area of the frame, so you have to get the area of the inner circle and subtract. You get A= 3.14 x 12^2. 3.14x144 is 452.16. 803.84-452.16 is 351.68. Hope this helped. :)

Answer:

351.86cm²

Step-by-step explanation:

12+4=16

(total radius of the whole circle)

use the formula a= πr² to find area

area of the full circle = π*16² (256 π)

256π - area of the smaller circle

256π -  π*12²

256 π - 144 π = 112πcm² or 351.86cm² (to 2dp)

Hope this helps!!

HEY YOU GUYSSS. I need help asap, I'm doing an extra credit assignment for math and I need to know the formula for any of these questions. THANKS

Answers

Answer:

1) S

2) M

3) I

4) E

5) A

6) L

thats what i got but i dont know y it isnt a proper word.

Answer:

1) S

2) M

3) I

4) E

5) A

6) L

Step-by-step explanation:

If every side of an octagon is 6 inches, what is the perimeter?

Answers

48 inches is the answer

ㅤpoint c and point d are plotted on the graph. plot points a and b to form rectangle abdc with an area of 36 square units. plot point e at (2, 4).

Answers

Answer:

A:(2,2)  B: (-4,2)

Step-by-step explanation:

A = (2, 2) | B = (-4, 2)

7x + 9 = 58 i need all the steps

Answers

Answer:

Step-by-step explanation:

7x + 9 = 58

     -9    -9      Subtract 9 from both sides

7x = 49

/7     /7           Divide both sides by 7

x = 7 (this is an apporximation)

Answer:

7

Step-by-step explanation:

1st you need to subtract 9 from both sides like this: 7x+9-9=58-9. and you'll get 7x=49. Then, divide by 7 on both sides like this: 7x/7=49/7. and you'll get x=7.

A sailboat and catamaran are in a race to see who can sail across the Atlantic ocean the fastest..

.The sailboat covers a distance of 3240 miles in 8 days
.The catamaran covered a distance of 4020 miles in 10 days
If the sailboat is able to maintain a constant rate for 10 days, how many more miles would they have traveled than the catamaran?

Answers

Answer:

The sailboat would cover 30 more miles than the catamaran.

Step-by-step explanation:

To find how many miles the sailboat goes in 1 day (unit rate) you divide 3240/8 that gives you 405 miles in one day. Multiply that by 2 to get 810 miles in two days. Add 810+3240=4050. That shows that in 10 days the sailboat would travel 4,050 miles which is 30 miles more than the catamaran.

PLEASE HELP. In the figure below, is there a dilation D that would map figure PQRS to figure P’Q’R’S’?

Explain in terms of scale factor and coordinates of corresponding points.

Answers

Hihihihihihihihihihi
you can use the app math papa or photomath if you need help with the graphing

The inequality x ≥ 25 can be used to represent the distance an athlete runs each week, where x is the distance in miles.
Which of these statements best describe the distance run by the athlete each week?

1. The distance is more than 25 miles.
2.The distance is no more than 25 miles.
3.The distance is at least 25 miles.
4.The distance is less than 25 miles.

Answers

Answer: 3

Step-by-step explanation:

because  that symbol means equal to or greater than/ equal to or less than depending which way its facing.

The answer is 3 as the symbol represents more than equal to meaning it can be more or equal to 25

The chooses are is and is not plz help

Answers

Answer:

Have a good day

Step-by-step explanation:

I don't know the chooses so how do I tell you the answer?

EXPERT HELP I'LL GIVE BRAINLIEST:

Answers

Answer:

where's the question???

I don’t see any image or problem to solve lol

Can someone plssss help?

Answers

Answer:

-3.333 so answer A is right

Step-by-step explanation:

Answer:

the answer is: A.

Step-by-step explanation:

also can I please have brainliest

A school raised a total of $1,648 to purchase new books. The money raised will be shared equally among 8 different classrooms. What is the total amount of money each classroom will receive?

Answers

Answer:

$206

Step-by-step explanation:

1,648  ÷ 8 = 206

1,648 divided by 8 =206

Simplify the expressions by combining like terms

-4f - 9 - f + 15

Answers

Answer:

-5f    +6

Step-by-step explanation:

-4f - 9 - f + 15

Combine like terms

-4f -f    -9 +15

-5f    +6

Answer:

-5f+6

Step-by-step explanation:

as we add like terms -4f+(-f)=-5f

-9+15=6

Billy used 6 centimeters of tape to wrap 3 presents. How many presents did Billy wrap if he used 32 centimeters of tape? Assume the relationship is directly proportional.

Answers

He wrapped 16 presents.

I don't know I'm doing something else

The scale factor from rectangle Y to rectangle Z is 2. Which statement is true?

A) The area of rectangle Z is twice the area of rectangle Y.

B) The area of rectangle Z is half the area of rectangle Y.

C) The sides of rectangle Z are twice as long as the sides of rectangle Y.

D) The angles of rectangle Z are twice as big as the angles of rectangle Y.

Answers

Answer:

Answer is C not A

What is the answer to this problem, and explain it please!

Answers

The answer is D. The value cannot be determined
The answer to this question would be D) The value cannot be determined from the information given. This is because we cannot divide x and y. If this question was 8x/2x then we would be able to determine the answer, but we cannot since the denominator is a y.

I NEED THIS ASAP I'LL GIVE BRAINLIEST

Marina simplified the expression 4x + 5(–4x – b) – (x – 2) to be –17x – 8.

What was the value of b?


A. -6

B. -2

C. 2

D. 10

Answers

Answer:

C.)

Step-by-step explanation:

4x -20x -5b -x +2=-17x -8

-17x-5b+2=- 17x-8

+17x +17x

-5b +2= -8

-2 -2

-5b = -10

b= 2

hope this helps.

The answer is : C. 2

please help me on this review of inequalities assignment!

Answers

Answer:

3:      x_> 16     4: x _>100 5: x>3    6:  x_< 200  

Step-by-step explanation:

I did this sheet.

Jeff bought a 5-gallon bucket of paint. He
used 1.25 gallons to paint his bedroom, then
he used two-thirds of the remaining paint for
his living room. How many gallons of paint
did he use to paint his living room?
of

Explain you answer!!

Answers

Answer:

2.5

Step-by-step explanation:

5-1.25= 3.75

two-thirds of 3.75 is 2.5

It’s 2.5 ____________

Which models represent the sum?


1.1 + 0.6


Select each correct answer.

Answers

It should be the number line
Sorry if it’s wrong :)

The "sum" of two numbers is: A the result when both numbers are added together B the result when the first number is subtracted from the second number C the result when the first number is multiplied by the second number D the result when the first number is divided by the second number

Answers

Answer:

A the result when both numbers are added together

The sum of two numbers is A

PLS HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Answers

Answer:

50

Step-by-step explanation:

Write the equation of the line in slope-intercept form using y=mx+b​

Answers

-1/3x-7=y
Slope is equal to rise over run and b is where it touches the y axis
y= -2x -7 hope this helps!

Please give a full explanation and answer on this

Answers

I think it’s Idek I’m dum

plz help me due in 30min

Answers

Answer:

$2.20

Step-by-step explanation:

$39.80/4= $9.95 per ticket

$46.50/6= $7.75 per ticket

$9.95-$7.75= $2.20 as your difference

I think this is right, I hope I helped!

2.20 [•_•] Bc yeahhhh

ANSWER PLSSSSSSSSSSSSSSS SOMEONE

Answers

The answer is A. Cause it’s the only one the says mi per hour

hhhhhhheeeeeeeeeeeelllllllllllllllppppppppppppppppp

Answers

Answer:d

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Ms. Savage’s Art Club is making a mural on a wall in the Annex by reproducing a painting on a different scale. The original painting is 12 1/4 inches long and 6 inches wide. The mural will cover an entire wall that is 183.75 feet long and 90 feet wide. What will be the scale that relates the original painting to the mural?

Explain, please

Answers

Answer:

4 feet

Step-by-step explanation:

i think

PLEASE HURRY I WILL GIVE BRAINLEIST

6x−7=2x+13

Rent-A-Tent rents party tents for a flat fee of $365 plus $125 a day. Capital Rentals rents party tents for a flat fee of $250 plus $175 a day. Delia wrote the following equation to find the number of days for which the total cost charged by the two companies would be the same.

365x+125=250x+175
Find and explain the error in Delia’s work. Then write the correct equation.


2x+14=4x−6

Ten less than 3 times a number is the same as the number plus 4.
Six times a number plus 4 is the same as the number minus 11.
the product of 3 and a number minus 10 is the same as four times the number
the sum of a number and 6 is the same as the number times 11.

.Shawn’s Rental’s charges $27.50 per hour to rent a surfboard and a wetsuit. Darla’s Surf Shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit. Write and solve an equation to determine the rental period in hours for which the charges for Shawn’s Rentals will be the same as the charges for Darla’s Surf Shop. Explain the steps of your solution.

Answers

Oh wow thats a lot so lets just do speed round:
1. x=5
2. Delia mixed up the flat fees with the daily fees. The equation should be 125x+365=175x+250
3. x=10
4. 3x-10=x+4
5. 6x+4=x-11
6. 3x-10=4x
7. x+6=11x
8. 27.5x=23.25x+17
(solving)
4.25x=17
x=4

Solve each of the following equations. Show its solution set on a number line. Check your answers. 2x-3=2

Answers

Answer:

x - 2.5

Step-by-step explanation:

2x -3 = 2

2x = 5

x = 2.5

Hope this helps!

The above step by step is correct and here it is on the number line
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