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
lianna [129]
3 years ago
15

Given the function f(x)=-5x^2-x+20 find f(3)

Mathematics
2 answers:
DochEvi [55]3 years ago
8 0

Answer: - 28

Step-by-step explanation:

f(x) = -5x^2 - x + 20

To find f(3), we simply put x = 3 and then simplify

f(3) = - 5(3)^2 - 3 + 20

= -5(9) - 3 + 20

= -45 - 3 + 20

= -48 +20

= -28

f(3) = -28

Marizza181 [45]3 years ago
3 0
F(x) = -5x^2 - x + 20;

f(3) = -5*3^2 - 3 + 20 = -5*9 - 3 + 20 = -45 - 3 + 20 = -28;

You might be interested in
Please help, I'm really confused with these two questions ):
erik [133]

Step-by-step explanation:

The die is rigged, so "not 3" is not a possibility.  Ruling out those branches of the tree, there are 4 possible outcomes, one of which is the desired outcome.  So the probability is 1/4.

A fair die has six sides that are equally likely, so the probability of rolling more than 2 is always 4/6.  The outcome of the first roll does not effect the outcome of the second roll.

7 0
3 years ago
Based on the figure below, what is the value of x?<br> BRAINLIEST<br> PLEASE HELP<br> SHOW WORK
Semenov [28]

Answer:

11

Step-by-step explanation:

5x+15+20=90

5x+35=90

-35 from both sides

5x=55

divide both sides by 5

x=11

7 0
3 years ago
Read 2 more answers
Joe is responsible for reserving hotel rooms for a company trip. His company changes plans and increases how many people are goi
coldgirl [10]

Answer:

The answer is below

Step-by-step explanation:

1) The number of rooms Joe company needs is 50. Let the number of rooms needed be n, this can be represented by the inequality:

n ≥ 50

Joe has already reserved 16 rooms, therefore the number of additional rooms needed to be reserved = 50 - 16 = 34 rooms. At least 34 rooms have to be reserved, if B is the number of additional blocks that Joe reserves, the inequality is:

B ≥ 34

2) Each block contains 8 rooms therefore the minimum number of block (a) needed to be reserved = 34/8 = 4.25 = 5 to the next whole number. Therefore the minimum number of blocks needed is given as:

a ≥ 5

Since each block cost $900, let c represent the minimum amount of money needed, therefore the least amount of money needed is given as:

c = $900(5) = $4500

c ≥ $4500

7 0
3 years ago
One side of a triangle is 12 feet shorter than the second side. The third side is 2 feet shorter than the second side. The perim
mylen [45]

Answer:

The three sides are 27 feet, 15 feet, 13 feet

Step-by-step explanation:

Let second side of a triangle be = a

Let one side be 12 feet shorter than the second side = (a - 12)

Let the third side be 2 feet shorter than the second side= (a - 12) - 2 =(a - 14)

Perimeter of triangle = Sum of length of all 3 sides

55 = a + (a - 12) + (a - 14)

55 = a + a + a - 12 - 14

55 = 3a - 26

55 + 26 = 3a

81 = 3a

a = 27

Length of one side, a - 12 = 27 - 12 = 15 feet

Length of second side, a = 27 feet

Length of third side, a - 14 = 27 - 14 = 13 feet

4 0
3 years ago
Read 2 more answers
Solve for a. please help me thanks
Firdavs [7]

Answer:

26 is your answer  

4 0
2 years ago
Other questions:
  • Evaluate the expression<br> What is b=4 and y=-5. 8b-y
    13·1 answer
  • Plz help ill give u brainlist
    15·1 answer
  • Chloe has 20 units cubes how many different rectangle or prism can you build with the cubes
    12·1 answer
  • What is the volume of this triangular prism?
    11·1 answer
  • Please solve kx-2=7 for x
    7·1 answer
  • Ben bowled 121 and 184 in his first two games. What must he bowl in his third game to have an average of at least 170​?
    10·1 answer
  • Enter the values for the highlighted variables to complete the steps to find the sum:
    11·2 answers
  • Please show me how you do this question
    13·2 answers
  • A box contains x apples.<br> 5 are green and the rest are red.<br> Write an expression for P(red).
    15·1 answer
  • Jake's apple farm has 228 apple trees. Last year, 182,172 apples were produced at Jake's apple farm. If each apple tree produced
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!