Mathematics Middle School

I need help, I am confused
3(r-2)=39

Answers

Answer 1

Step-by-step explanation:

3(r-2)=39

divide both side by 3

3/3 (r-2)=39/3

r-2=13

adding 2 on each side

r-2+2=13+2

r=15

your answer is r=15

Related Questions

In a seventh-grade class of 28 students, there are 16 girls and 12 boys. If one student is randomly chosen to win a prize, what is the probability that a girl is chosen?

Answers

Answer:

65/100

Step-by-step explanation:

A quadrilateral has the following coordinates:

Point A: (4, 7)
Point B: (–4, 7)
Point C: (–4, –7)
Point D: (4, –7)

What is the length of side CD?

Answers

Answer:

Step-by-step explanation:

What is 2+4+6-9+17-4=x

Answers

Answer:

x = 16 or 16 = x

Step-by-step explanation:

2+4+6-9+17-4=x

6+6-9+17-4=x

12+17-9-4=x

29-9-4=x

20-4=x

16=x

Answer:

[tex]x = 16[/tex]

Step-by-step explanation:

[tex]2 + 4 + 6 = 12[/tex]

[tex]12 - 9 = 3[/tex]

[tex]3 + 17 = 20[/tex]

[tex]20 - 4 = 16[/tex]

Find the value of b given the points (-6, 8) and (-1, b) if the distance is [tex]\sqrt{29}[/tex]

Answers

Answer:

the distance is 10

no one get the answer right so i will repost this again

Answers

Answer: the rectangle is 5 and the other one is i think 135  

Step-by-step explanation:

rectangle is 5, not sure about the other inw

The taillight of a car is in the shape of a kite whose diagonals are both 15 centimeters. How many square centimeters does the kite occupy?

30
56.25
112.5
225

Answers

The answer is 30
Have a great day!!

Presley graphed a system of equations, and the graph showed two parallel lines. What does this mean?

A. The system of equations has one solution
B. The system of equations has no solution
C. The systems of equations had infinite solutions
D. Presely made a mistake in her graphing

Answers

Answer:

i think the answer is C

Step-by-step explanation:

im so sorry if im wrong

I’m pretty sure the answer is b

i need help pls help me

Answers

Answer:

the answer for a is t-10p= x

Step-by-step explanation:

t= tomatoes

p= pounds

x= leftover amount of tomatoes.

2.5x - 10 = y

x, y
ethan amt, zachary amt
2.5, 10, x, y
2.5
10

4/9 kilogram of baking soda costs $2. How much does 1 kilogram of baking soda cost?

please drop an explanation, and equation thanks!

Answers

Ok so we want to cross multiply.
To do this you know 4/9=2$ so now you want to know 1=x$
When you do this you get $5

Answer:

1 kg of baking soda costs $4.50.

Step-by-step explanation:

Write and solve an equation of ratios, as follows:

 4/9 kg            $2

------------- = --------------

    1 kg               x

Multiplying both numerators by 9, we get:

  4 kg          $18

------------ = ---------

   1 kg             x

Cross-multiplying, we get 4x kg = $18-kg.  Solving for x, we get:

        $18-kg

x = -------------- = $4.50

         4kg

1 kg of baking soda costs $4.50.

A cylinder has a volume of 24 cubic feet. Which of the following could have the same radius and height as the cylinder?

A. A cone with a volume of 72 cubic feet
B. A cone with a volume of 32 cubic feet
C. A sphere with a volume of 18 cubic feet
D. A cone with a volume of 8 cubic feet

Answers

DO NOT OPEN THAT FILE THEY COULD BE TRYING TO HACK YOU, i've seen them send it to a lot of ppl

Brainiest if correct please help

Answers

It is A, both of those angles equal 90 and supplementary angles equal 180

Answer:

A.

Step-by-step explanation:

Supplementary angles are angles that add up to 180°

<TUS measures 90°

<QUN measures 90°

Both angles added together equals 180°

The radius of a circle is 8 millimeters. What is the circle's circumference?

Answers

Answer:

uh what is a circumference

Step-by-step explanation:

Answer:

16 π or 50.26548246 mm (you can use either)

Step-by-step explanation:

1) 8 x 2 = 16

2) 16 x π = 16 π or 50.26548246

Help me with PART B!!! Use image to help!!

Answers

i think it’s 3
i multiplied .2222 times 18

can someone help i have no idea what to write here-

Answers

Answer:

scary maybe or unpredictable  :D i duno

can somebody please help me and explain a little bit? :(

Answers

Median: number in middle
Arrange in lowest to highest
1, 2, 3, 3, 4, 6, 7, 8
Cross out numbers until you reach the middle two
3 and 4, what’s between them?

Solution: 3.5
The median is the middle number in a set of numbers.
For this set of numbers, the median would either be 7 or 1 because the set of numbers is uneven

The table below gives the price for different numbers of burgers. Do the numbers in the table represent a proportional relationship?

Answers

yes it does.
18/6=21/7=24/8=27/9= 3

3x + 2 = -55 i need all the steps

Answers

Answer:

-19

Step-by-step explanation:

3x+2 = -55

   -2         -2

3x = -55-2

3x = -55+-2

3x = -57

/3      /3

x=-19

Answer:

-19

Step-by-step explanation:

[tex]3x + 2 = -55[/tex]

[tex]3x = -55[/tex]

       [tex]-2[/tex] (2 is negative because it was moved to the other side of the equation)

[tex]3x/3 = -57/3[/tex]   (Divide both sides of the equation by 3 to isolate x.)

[tex]x = -19[/tex]

HELP ME GOING TO BE ON A TESTTTT!!!!!!!!!!!!!!!!

Answers

Answer:

, x=6

Step-by-step explanation:

5(6+y) =30 +5y

5(y+x) =5y +5x

So 5 x 6 is 30

mm... help please. I need to finish this homework, and I'll give brainliest since I'm numb.

Answers

Answer:

I think graph represent x>2. or (2,infinity)

Is it’s x>2 because I’m very nice

An octagon has an area of 55.3 square inches. It is a smaller version of an octagon whose dimensions are 7 times larger. What is the area of the larger octagon?

Answers

9514 1404 393

Answer:

  2709.7 square inches

Step-by-step explanation:

If the linear dimensions are a factor of 7 larger, then the area is a factor of 7^2 = 49 larger.

  larger area = 49(55.3 in^2) = 2709.7 in^2

Which table represents values of x and y such that y = x + 4

Answers

Answer:

C

Step-by-step explanation:

I think don't blame me if won't :(

It’s b so ye I like pizza pizza Liza

need help with this one question

Answers

Answer:

71.6599

Step-by-step explanation:

I think if I’m wrong please tell me

wich ik I’m probably wrong

PLEASE HELP... Find the area of the semicircle. Round your answer to the nearest hundredth.

THE DIAMETER IS 24 INCHES.

area: about [?] inches^2

Answers

It’s not on that file, it’s a scam
It’s not on the file so it is a scam

Ok so I have been trying to figure this answer out but I CANT SO PLZZZZZ HELP AND NO LINKS!!!

Graph the following inequalities on a number line.
X ≥ -4

Answers

x is greater then -4 because x is just one
On a number line draw a closed circle on -4 then draw a line from it facing right

Closed circle is greater/less than or equal then the line shows if x could be doing higher or lower number

How are convection currents in the mantle (geosphere) and in the oceans (hydrosphere) similar? Or how are they different. Explain one of the two or how their similar and different. Thanks :)
I give brainliest to whichever makes the most sense

Answers

Answer:

They are different because in the mantle, the magma is heated, it becomes less dense and rises. It give off it's thermal energy and cools down, becoming more dense and descend to be heated again.

In the ocean, the tropics warm the water and it travels to the poles to cool down, then returns to the tropics to heat up again.

they are similar in the ways that they move and create energy.

different because

Are my answers correct??

Answers

Answer:

Yes, but I'm no expert.

yesss i think i’m not that smart lol

Plz help: what is the probability?
Rolling a number that is less than three 5 times in a row on a number cube labeled 1 through 6

Answers

Answer:

whats the options

Answer:

well to me it would be a half and half deal so you might and you might not..

Step-by-step explanation:

Pepino’s pizza charges $8 for medium pizza plus $2 for each topping. How many toppings are on a medium pizza that costs $20?

Answers

Answer:

6 toppings

Step-by-step explanation:

Find how much the toppings cost in total without the medium pizza.

20 - 8 = 12

12 ÷ 2 = 6 toppings

There would be 6 toppings on the medium pizza.

PLEASE HEELP AND THANK YOU

Answers

Huh huh huh huh huh huh huh

Answer:1/20 to decimal= 0.05 to a percent=5%

Step-by-step explanation: Sorry thats all I know:(

If x is 100, what is the area of the cell phone's range?
BTW, it is in feet.

Answers

3.1415926535897932384626433

H:$/1111.7733744477z !:;7;;):34.
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