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
Anettt [7]
3 years ago
12

Let f(x)=x^2-8x+5. Find f(-1)

Mathematics
1 answer:
polet [3.4K]3 years ago
3 0
F(x) = x² - 8x + 5

f(-1) = (-1)² - 8*(-1) + 5

         = 1 + 8 + 5 = 14

f(-1) = 14.
You might be interested in
Katy's favorite rides at the amusement park are the roller coasters and water slide. The wait time for the roller coaster is 25
ioda

Answer:

She went on the slide 8 times and on the roller coaster 4 times

Step-by-step explanation:

We convert each statements to a mathematical equation.

Firstly, let's represent the number of times she went on the coaster with R and the number of times on the slide with S. We know quite well she went on 12 rides. Hence the summation of both number of times yield 12.

Mathematically, R + S = 12. ........(i)

Now we also know her total wait time was 3hours. Since an hour equals 60 minutes, her total wait time would equal 180 minutes.

To get a mathematical representation for the wait time, we multiply the number of roller coaster rides by 25 and that of the slides by 10.

Mathematically, 25R + 10S = 180 .......(ii)

Here we now have two equations that we can solve simultaneously.

From equation 1 we can say R = 12 - S. We can then substitute this into equation 2 to yield the following:

25(12 - s) + 10s = 180

300 - 25s + 10s = 180

300 - 25s + 10s = 180

300 - 15s = 180

15s = 300 - 180

15s = 120

S = 120/15

S = 8

S = 8 , and R = 12 - S = 12 - 8 = 4

7 0
3 years ago
Can anyone help me. Will give you all my points and brainliest:)
PilotLPTM [1.2K]

See the attachments for the answer :)

8 0
3 years ago
Hey I’m having trouble finding out how to divide fractions
solniwko [45]

The first step to dividing fractions is to find the reciprocal (reverse the numerator and denominator) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. Finally, simplify the fractions if needed.

5 0
2 years ago
HELP PLEASE!!!
PilotLPTM [1.2K]

Answer:

450 millilitres

Step-by-step explanation:

1) \frac{1}{2} of the water is gone, so you need to divide 900 by 2 to see how much is left

900÷2 = 450

5 0
3 years ago
A pond at a hotel holds 4,290 gallons of water.
Kisachek [45]

Answer:

55 hours

Step-by-step explanation:

Write the problem as an equation.

4290-78x=0

Where 'x' is each hour the pond is being drained.

Then, solve.

4290=78x        Add 78x to each side of the equation

55=x                 Divide both sides by 78

5 0
3 years ago
Other questions:
  • Three negative numbers are added together. Which of the following statements is correct about the sum?
    5·2 answers
  • 1. Ana was washing dishes at the end of her shift at a restaurant. She washed 30 plates from 7:30 to 7:35. When she finishes was
    9·1 answer
  • Solve the equation: 1/2x^2 + x when x = 4
    8·1 answer
  • 5/17 multiplied by 3/8
    10·2 answers
  • 20x-8y=-5 <br> 10x-4y=-4<br><br> Can someone please solve this
    8·1 answer
  • HELPWITH THIS QUESTION
    11·2 answers
  • Find measure of &lt;_B.
    8·1 answer
  • Use the diagram of the right triangle above and round your answer to the nearest hundredth.
    10·1 answer
  • The huh y b v c h b f y n<br>​
    14·2 answers
  • A bakery makes 40 different flavors of muffins. 25% of the flavors have chocolate as one of the ingredients. How many flavors ha
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!