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
tia_tia [17]
2 years ago
10

Given ƒ(x) = 3x + 9, find x when ƒ(x) = 21.

Mathematics
2 answers:
Dima020 [189]2 years ago
7 0
3x + 9 = 21
3x = 12
x = 4
maksim [4K]2 years ago
6 0

Answer:

4

Step-by-step explanation:

ƒ(x) = 3x + 9; Substitute 21 for ƒ(x).

21 = 3x + 9

21 − 9 = 3x

12 = 3x → x = 4

You might be interested in
Please answer my question correctly.<br><br>Nonsense/Plagiarized = Report​
timurjin [86]
So the circumference of a circle is C=2 times pi times the radius. in this case it would be C= 2(pi)(4) which is 25.1 :)
6 0
3 years ago
Read 2 more answers
Find the sum of the first 5 terms of the infinite series: 8 + 18 + 28 +
Anna007 [38]

Answer:

8 + 18+ 28+ 38+ 48= 140

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Each class briarwood elementary collect at least 54 of food during the drive. If there are 29 classes in the school,what was the
julia-pushkina [17]

Answer:

1566

Step-by-step explanation:

20*50=1000

20*4=80

<h3>1000+80=1080</h3>

9*50=450

9*4=36

450+81=486

<h2>1080+486=1566</h2>
4 0
2 years ago
Read 2 more answers
Please help me. Brainliest to best answer!
Bingel [31]

Answer:

4y + 48 - 16x = 0        ~Solve for y~

4y = -48 + 16x

y = -12 + 4x

The slope is 4.

We'll use the point (1, 4) and m = 4.

Plug these into the equation: y - y1 = m(x - x1)

y - 4 = 4(x - 1)

y - 4 = 4x - 4

y = 4x 

6 0
3 years ago
PLSS HELP ME!! I need to find the value of x
-BARSIC- [3]

Answer:

D. 12°

Step-by-step explanation:

80° + 5x = 140°

or, 5x = 140° - 80°

or, x = 60°/5

:. = 12° <em><u>Ans</u></em>

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is (4y) to the second power when y =-5
    12·1 answer
  • Simplify the expression<br> 2/5y - 4 + 7 - 9/10y
    7·2 answers
  • Fully describe what it means to have a positive slope and a negative slope. Your description should be given from a graphical pe
    9·1 answer
  • What is 13/20 times 60/x
    15·1 answer
  • Please help 30 points
    9·1 answer
  • In a city, 22 coffee shops are randomly selected, and the temperature of the coffee sold at each shop is noted. Use Excel to fin
    6·1 answer
  • Cara is trying to drink more water. She wants to drink 212
    11·1 answer
  • The difference of x and a number is 6. What is the other number?
    9·1 answer
  • What is 4^6 . 4^6 please help​
    13·1 answer
  • If a pack of highlighter costs 2.40 what is the cost Per highlighter, in dollars and cent
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!