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
anygoal [31]
2 years ago
8

The sum of a number and twelve is twenty-one. What is the number? 21 n 12 8 9 10 33

Mathematics
2 answers:
Sonbull [250]2 years ago
4 0

Answer:

9

Step-by-step explanation:

Subtract 1 2 12 12 from both sides of the equation + 1 2 = 2 1 + 1 2 − 1 2 = 2 1 − 1 2 2 Simplify Solution = 9

UkoKoshka [18]2 years ago
3 0

Answer:

9+12=21

Step-by-step explanation:

You might be interested in
Help me solve this pleaseeee
MaRussiya [10]

Answer:

f(n) = 6n + 12

Step-by-step explanation:

There is a common difference in consecutive number of seats, that is

42 - 36 = 36 - 30 = 30 - 24 = 24 - 18 = 6

This indicates the sequence is arithmetic with nth term

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 18 and d = 6 , then

f(n) = 18 + 6(n - 1) = 18 + 6n - 6 = 6n + 12

5 0
3 years ago
If there are 3 classrooms that each have 25 desks and there are a total of 87 students, how many more desks need to be added to
oksano4ka [1.4K]
12 more seats/desk is how many more

3 0
3 years ago
Read 2 more answers
I need the answer hurry please
denis23 [38]
For all of the questions or only one-?
3 0
2 years ago
Which angles are linear pairs? Check all that apply.
AlexFokin [52]
Linear pairs are when 2 lines intersect, and are adjacent angles.

The measure of a straight angle is 180 degrees, so a linear pair<span> of angles must add up to 180 degrees.
</span>
I hope my answer helped!!!
6 0
3 years ago
Read 2 more answers
A 32-ounce soda costs $4.00 at a movie theater. What is the approximate cost per ounce for the soda?
Rom4ik [11]

Answer:

1 oz of soda costs about $0.13

Step-by-step explanation:

32 oz = $4.00

Divide each side by 32 to simplify.

1 oz = $0.125

$0.125 ≈ $0.13

3 0
2 years ago
Other questions:
  • If 8 out of 20 students in a class are boys,what percent of the class is made up of boys
    5·1 answer
  • Use the diagram to find the value of a. The parallel lines are marked
    12·1 answer
  • What is a half of teaspoon of salt
    6·2 answers
  • Kelly tells you that when variables are in the denominator, the equation becomes unsolvable. "There is a value for x that makes
    6·1 answer
  • Please help.........
    13·1 answer
  • Perry bought 9 pairs of pant for a total of $510.Dress pants cost $90 and jeans cost $40 .how many of each type of pants did he
    15·1 answer
  • Hi! Hope You're Having A More Than Amazing Day!
    5·2 answers
  • A car is driving at 100kilometers per hour. How far, in meters, does it travel in 2 seconds? Give answer to
    7·1 answer
  • Apple estimates that 2.8 million square feet of the building is used for office space. Is their estimate reasonable? Below is th
    12·1 answer
  • An unfair coin lands on heads with probability $\frac34$ and tails with probability $\frac14$. A heads flip gains $\$3$, but a t
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!