1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vampirchik [111]
3 years ago
8

If 21 more than 3 times a number is -15, what is the number?

Mathematics
2 answers:
AnnyKZ [126]3 years ago
6 0

Answer:

-12

Step-by-step explanation:

let the number be x

"3 times a number"  : 3x

"21 more than 3 times a number" : 21 + 3x

"21 more than 3 times a number is -15" : 21 + 3x = -15

Solving this equation:

21 + 3x = -15 (subtract 21 from both sides)

3x = -15 - 21

3x = -36 (divide both sides by 3)

x = -36/3 = - 12

Rama09 [41]3 years ago
3 0

Answer:

The number is -12.

Step-by-step explanation:

3x+21=-15

3x=-15-21

3x=-36

x=-36/3

x=-12

You might be interested in
Help pleasssss Order the following numbers from least to greatest.<br> 0.58 0.28 1/2
Tema [17]
Answer. 0.28, 1/2, 0.58
Explanation. If you convert all the numbers to decimal form, we find that this is their position from least to greatest. Hope this helps, let me know if it is correct so others can use it as well :)
Good luck.
8 0
3 years ago
Read 2 more answers
Please help m solve this it's about shaded areas. I need it fast. PLZ HELP THANK YOU IF YOU DO AND U R SO AMZING IF U DO&gt;
sukhopar [10]

A = area of the circle

A = pi*r^2

A = pi*11^2

A = 121pi

-----

B = area of the rectangle

B = length*width

B = 6*4

B = 24

-----

C = blue shaded area

C = A - B

C = 121pi - 24 which is the exact area in terms of pi

C = 356.1327 is what you'd get if you used a calculator

C = 356.13 is the result after rounding to the nearest hundredth

<h3>The final answer is 356.13</h3>
5 0
4 years ago
help me solve this. If your hair grows 2 cm per month and you don't cut it for 5 years, how many feet and inches will it grow?
Aleksandr [31]
120 cm. >> 3 feet and 11.24 inches
6 0
4 years ago
Read 2 more answers
Solve each of the following equations. (2 answers)<br><br> |2x-3|=2
Roman55 [17]

Answer:

x= 5/2 or 1/2

Step-by-step explanation:

absolute value always gives us positive

if |u| = 2, u can be -2 or 2

2x-3 = 2

2x = 5

x = 5/2

2x-3 = -2

2x = 1

x= 1/2

in general, set the stuff inside the absolute value to equal both positive and negative of the equivalent value

6 0
3 years ago
in mrs marshall's classroom 6/7 of the students play sports. of the students who play sports, 4/5 also play an instrument. if th
yanalaym [24]
(4/5)*(6/7)*35 = (24/35)*35 = 24 students do both.
6 0
4 years ago
Read 2 more answers
Other questions:
  • Which method would determine the volume of the prism with dimensions 2 times 2 and one-fourth times 4 shown below?
    14·2 answers
  • Whoever helps with 3 and 4 gets brainliest answer and 10 points :)
    11·1 answer
  • Angle A is circumscribed about circle O. What is the measure of angle O? 46
    9·1 answer
  • How do I find the perimeter of the regular polygon
    7·1 answer
  • What property is 8a+4=4+8a
    11·1 answer
  • Which of the following measureemnts is the most percise?
    12·2 answers
  • Kim is x years old . jordan is 7 year older than kim. four times jordans age is equal to 200
    12·2 answers
  • The height of a statue is 320 feet. Nicole, who is standing next to the statue, casts a 6 foot shadow and she is 5 feet tall. Ho
    10·1 answer
  • 1.6022x 10-19 round three decimal places
    15·1 answer
  • Distance between (3,-7) and (3,5)
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!