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
GenaCL600 [577]
3 years ago
14

If ƒ(x ) = 3x + 1 and ƒ -1 = , then ƒ -1(7) =

Mathematics
1 answer:
Elden [556K]3 years ago
6 0
F(x) = 3x + 1

let f(x) = y

y = 3x + 1

y - 1 = 3x

3x = y - 1

x = (y - 1)/3

From y = f(x),  x = f⁻¹(y) 

<span>x = (y - 1)/3
</span>
 f⁻¹(y)  = (y - 1)/3

f⁻¹(7)  = <span>(7 - 1)/3 = 6/3 = 2

</span>f⁻¹(7)<span> = 2</span>
You might be interested in
Need help ??????????????
lesantik [10]

Answer: the answer is the first one ,the third one , and the fourth

Step-by-step explanation:5x5 25

15x15 225

6 0
3 years ago
Simplify (5x-7) (2x+3) (7x-8)
Natali5045456 [20]

Answer:

70x³ - 73x² - 155x + 168

Step-by-step explanation:

Given

(5x - 7)(2x + 3)(7x - 8) ← expand the first pair of factors using FOIL

= (10x² + x - 21)(7x - 8)

Each term in the second factor is multiplied by each term in the first factor, that is

10x² (7x - 8) + x(7x - 8) - 21(7x - 8) ← distribute the 3 parenthesis

= 70x³ - 80x² + 7x² - 8x - 147x + 168 ← collect like terms

= 70x³ - 73x² - 155x + 168

3 0
3 years ago
Anthony buys one pound of oranges for $12 and sells it for $14. How can he write the profit in his account book?
Aleonysh [2.5K]
The answer would be, A) +$2 because he spend $12 but earned $14 so when you subtract 14 and 12 you get $2, which would be his profit
5 0
3 years ago
R/19 &gt; -1<br> please help solve for R
pantera1 [17]

Answer:

Step-by-step explanation:

\frac{r}{19}>-1

Multiply both sides by 19

\frac{r}{19}*19>-1*19 \\\\r > -19

8 0
3 years ago
Jane is a cliff diver and she is planning on jumping from a height of 747 feet and landing in the water below. She will end her
nekit [7.7K]

Answer:

811 feet

Step-by-step explanation:

When finding height difference, you use absolute value, so everything is positive. 747+64 = 811, so your answer is 811 feet.

Hope this helps!

8 0
3 years ago
Read 2 more answers
Other questions:
  • Thurston wants to retire in Nevada when he is 80 years of age. Thurston, who is now 55, believes he'll need $400,000 to retire c
    11·1 answer
  • Negative X to the second power + 6z over y
    10·1 answer
  • A girl owns 2 pairs of pants, 1 shirts, 1 ties, and 5 jackets. how many different outfits can the girl wear to school if each ou
    6·1 answer
  • Find the inverse of the function.
    14·2 answers
  • Exactly how many planes contain points J, K, and N? 0 1 2 3
    11·1 answer
  • Elaine is making a flower garden with rows of flowers. The garden is 20 yards long. She wants a total of 7 rows of flowers that
    15·2 answers
  • Will mark brainiest for the first one with the correct answer.
    7·2 answers
  • I need help with number 7
    5·1 answer
  • Write an equation for a line perpendicular to y = -5x – 4 and passing through the point (15,5)
    6·1 answer
  • Hi! So, I've got a question. My Math problem is a 2 part problem. Let me just write it out real quick.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!