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
nata0808 [166]
3 years ago
5

F(x) =-x^2+x+13 find f(9)

Mathematics
2 answers:
Sever21 [200]3 years ago
7 0

Answer:

f(9) = - 59

Step-by-step explanation:

Substitute x = 9 into f(x) , that is

f(9) = - (9)² + 9 + 13

     = - 81 + 22

    = - 59

ludmilkaskok [199]3 years ago
4 0

Answer:

-59

Step-by-step explanation:

f(x) =-x^2+x+13

Let x = 9

f(9) = - (9)^2 +9+13

       = -81 +9+13

      = -59

You might be interested in
Arcsin(sin(3pi)) ...?
expeople1 [14]
The solution to the problem is as follows:

arc sin (sin 3pi) = theta 
<span>where theta is the angle ur looking for </span>
<span>so that becomes </span>
<span>sin (theta) = sin 3pi </span>
<span>sin (theta) = 0 </span>
<span>theta = 0, pi
</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
6 0
3 years ago
Help please grade 8 20 points and i need it
bearhunter [10]

Answer

1) (4,6)

2) (5,5)

3) (2,6)

Step-by-step explanation:

4 0
3 years ago
Mitch is buying candy bars for his friends. He wants to give 2 bars to each friend, and he wants to have 10 spare bars. He can a
gregori [183]

Answer:

A. 2f + 10 = 28

Step-by-step explanation:

28 candy bars.

He wants 10.

28 - 10.

18 candy bars.

He gives each friend 2.

18 divided by 2.

9.

He can treat 9 friends.

Step 1: Subtract 10 from both sides.

2f+10=28

which would take away the 10 and subtract 10 from 28. (That would be Jack's bars.)

2f = 28.

Step 2: Divide by 2 on both sides.

2f = 28

which would cancel out the 2f. And Whatever is done to the left is done to the right, meaning you would divide 28 by 2 aswell. (Dividing up the candy bars among his friends).

f = 9

6 0
3 years ago
Decrease 140g by 25%
Ilia_Sergeevich [38]

Answer:

• let's first get the percentage decrease:

= { \rm{100\% - 25 \% }} \\ { \rm{ = 75\%}}

• then multiply the percentage decrease with the mass given:

= { \tt{75\% \times 140}} \\  \\  = { \tt{ \frac{75}{100}  \times 140}} \\  \\  = { \underline{ \tt{ \:  \: 105 \: g \: }}}

8 0
3 years ago
Read 2 more answers
Elise and her dad are planning to attend the state fair. An adult ticket is $21.00. The price of an adult ticket is $10.00 more
belka [17]

Answer:

C)two thirds x + 10 = 21

Step-by-step explanation:

The equation for determining how much it would be paid for the student tickets is shown below:

Given that

The ticket of an adult is $21

Now let us assume the price of the student ticket be x

So two third would be 2 ÷ 3x

And for adult it would be

2 ÷ 3x + 10

Now the equation is

2 ÷ 3x + 10 = 21

So after solving this the option c is correct

And the rest of the options are wrong

6 0
3 years ago
Other questions:
  • Solve the inequality. 6y+5&gt;8
    9·2 answers
  • PLEASE HELP ILL GIVE YOU A BRAINLIEST!!
    15·1 answer
  • Given the function f(x) = 0.5(3)x, what is the value of f−1(7)?
    9·1 answer
  • If mA=15 and mCD=55 then mGE= 25 85 30
    12·1 answer
  • The length of a rectangle is 8 ft less than three times the width, and the area of the rectangle is 35 ft. Find the dimensions o
    14·1 answer
  • A number f multiplied -12.3 is --73.8
    14·1 answer
  • 256 is what percent of 400
    13·2 answers
  • Find the slope of the line that passes through (8,10) and (5,5)
    10·1 answer
  • Determine if the following relations are functions. If they are functions, also state the domain and range.
    11·2 answers
  • When a number is divided by 8, The quotient is 9, what is the number​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!