f(x) = 2x2 – 15
Find f(-2)

Answers

Answer 1
f(x) = 2x^2 -x -15 = 0

Related Questions

there are no 43 people in the cafeteria what is the inequality ​

Answers

Answer:

Step-by-step explanation:

if you have the option, you can say

# of people ≠ 43

Solve each quadratic equation by completing the square.
6x2 – 28x = - 16

Answers

Answer:

           There  is no real solution

Step-by-step explanation:

[tex]6x^2-28x = - 16\\\\6x^2-28x + 16=0\\\\3x^2-7x+8=0\\\\9x^2-21x+24=0\\\\(3x)^2-2\cdot3x\cdot\frac72+(\frac72)^2-(\frac72)^2+24=0\\\\(3x-\frac72)^2-\frac{49}4+24=0\\\\(3x-\frac72)^2-12\frac{1}4+24=0\\\\(3x-\frac72)^2+12\frac{3}4=0\\\\(3x-\frac72)^2=-12\frac{3}4[/tex]

khan academy graph from the linear standard form.
Graph -14x + 21y = 84

Answers

Answer:

16

Step-by-step explanation:

because i am smort

The pictures show you the work and the answer.


Write 5.77 x 10 in standard form.
5.77 x 10–2

Answers

Answer:

The answer is 57.7 x.

Step-by-step explanation:

Cleo and jandi are having a Halloween party. They have 3 1/2 pounds of candy to divide into 14 goodie bags. How much candy will be in each bag?

Answers

Answer:

1/4 pound(s) of candy in each bag

Step-by-step explanation:

3 1/2 (pounds of candy) ÷ 14 (goodie bags) = ?

To make this easier let's turn 3 1/2 into a improper fraction and flip 14/1 (14/1 to 1/14):

3 1/2 = 7/2       14/1 = 1/14

Now we multiply:

7/2 x 1/14 = 7/28 = 1/4

(When you divide fractions, you can flip the second fraction and multiply and get your answer. Remember to simplify once you get your answer!)

Hope I helped! Sorry if wrong!

Answer:

1/4 pounds

Step-by-step explanation:

What is the sum of the first 21 even numbers? FAST!!!

Answers

Answer:

462

Step-by-step explanation:

Sum = n/2 x (a + Tn)

= 21/2 x (2 + 42)

= (21 x 44)/ 2

= 924/2

2 + 4 + 6 + 8 + 10 + 12 + . . . . + 42 = 462

(5x² + 8x - 3) + (2x² - 7x + 13x)

Answers

Answer:

Simplify the expression.

7x2+14x−3

Step-by-step explanation:

The required simplification can be given as 7x²+ 14x - 3

What is simplification?

The operation in mathematics to process and interpret the relation to make function simple or more simple is called simplify and the phenomenon is called simplification.

We have,
= (5x² + 8x - 3) + (2x² - 7x + 13x)

= 5x²+ 2x²+ 8x - 7x + 13x - 3
= 7x²+ 14x - 3

Thus, the required simplification can be given as 7x²+ 14x - 3

Learn more about simplification here:
https://brainly.com/question/12501526

#SPJ2

If you have a negative slope how do you graph it?

Answers

\ the same direction the slash on the side is pointing right and down

d=b^2-4ac solve for a

Answers

Answer:

a=-d/4c+b^2/4c

Step-by-step explanation:

This is really confusing can someone help?

Answers

Answer:

D.780.8

Step-by-step explanation:

multiply 244 and 3.2 and you get D. hope this helps.

Answer:

B (780 4/5)

Step-by-step explanation:

He’s buying 24 boxes, and each box weighs 3 1/5 pounds. So we need to multiply 24 x 3 1/5, resulting in 780 4/5

So sorry if I’m wrong. Have a good day!

~Louella Marie Smith♥️

PLS HELP! WILL BE MARKING BRAINLIEST!!!!!!!!

Answers

Answer:

Tracy most likely saw 13 cars, and 13 motorcycles. Other solutions that you can find are: average number of tires in the area, the mode number of tires in the area (see the most often), etc.

Step-by-step explanation:

2x + 4x = 78

2(13) + 4(13) = 78

As 13 and 13 are two prime numbers, the answer will be 13.

Shelby wants to buy 10 yards of fabric that costs $2.49 per yard. How much money will Shelby need to purchase all the fabric? $2.49 $4.01 $12.49 $24.90

Answers

Answer:

$24.90

Step-by-step explanation:

Answer:

24.90

Step-by-step explanation:

9. PRODUCTION Brown Pencil factory can
produce 150 gross of pencils in a quarter of an
hour. At this rate, how many gross of pencils
can the factory produce in seven and a half
hours?
Please hurry

Answers

Answer:

4500

Step-by-step explanation:

Ian measures 9 kg of rice. One kilogram is approximately equal to 2.2 pounds. Which measurement represents the number of pounds of rice?

Answers

Answer:

19.8 pounds

Step-by-step explanation:

9 kg  x   2.2 pounds

                   1 kg

= 19.8 pounds

Answer:

19.8

Step-by-step explanation:

Select the prime factors of 204.
A. 2 x 17
B. 6 x 17
C. 2 x 3 x 17
D. 2 x 2 x 3 x 17

Answers

I think it’s is either D or C

If 12 cats can catch 6 rats in 2 hours, how many hours would it take 50 cats to catch 75 rats?

Answers

Answer:

50 cats would take 6 hours to catch 75 rats.

Step-by-step explanation:

After reading the statement we noticed the existence of two relationships:

1) The amount of cats is directly proportional to the quantity of caught rats.

2) The amount of cats is inversely proportional to time taken to catch rats.

That is to say:

[tex]n \propto \frac{x}{y}[/tex]

[tex]n = k\cdot \frac{x}{y}[/tex] (Eq. 1)

Where:

[tex]n[/tex] - Amount of cats, dimensionless.

[tex]x[/tex] - Amount of caught rats, dimensionless.

[tex]y[/tex] - Time, measured in hours.

[tex]k[/tex] - Proportionality ratio, measured in hours.

Then, we obtain the following relationship by eliminating the proportionality ratio in (Eq. 1):

[tex]\frac{n_{1}\cdot y_{1}}{x_{1}} = \frac{n_{2}\cdot y_{2}}{x_{2}}[/tex] (Eq. 2)

Where:

[tex]n_{1}[/tex], [tex]n_{2}[/tex] - Initial and final amounts of cats, dimensionless.

[tex]x_{1}[/tex], [tex]x_{2}[/tex] - Initial and final amounts of caught rats, dimensionless.

[tex]y_{1}[/tex], [tex]y_{2}[/tex] - Initial and final times, measured in hours.

Now we clear final time in (Eq. 2):

[tex]y_{2} = y_{1}\cdot \left(\frac{n_{1}}{n_{2}} \right)\cdot \left(\frac{x_{2}}{x_{1}} \right)[/tex]

By knowing that [tex]y_{1} = 2\,h[/tex], [tex]n_{1} = 12[/tex], [tex]x_{1} = 6[/tex], [tex]n_{2} = 50[/tex], [tex]x_{2} = 75[/tex], then we get that time taken by 50 cats to catch 75 rats is:

[tex]y_{2} = (2\,h)\cdot \left(\frac{12}{50} \right)\cdot \left(\frac{75}{6}\right)[/tex]

[tex]y_{2} = 6\,h[/tex]

50 cats would take 6 hours to catch 75 rats.

Use the function to fill in the table.
g(x)=-3x+1

Answers

The answer from top to bottom of the graph, (-2,-7), (-1,4), (0,1), (1,-2),(2,0)

HURRY!! THIS ASSIGNMENT IS DUE IN 5MIN!!! THANK YOU!!!!!!


Find the discounted price.
flashlight: $18.00 discount: 25%

Answers

Answer:

You can also calculate how much you save by simply moving the period in 25.00 percent two spaces to the left, and then multiply the result by $18 as follows: $18 x . 25 = $4.50 savings.

-16 - (-t) = -45 how do you solve this please help​

Answers

Answer:

- 29

Step-by-step explanation:

Step 1:

- 16 - ( - t ) = - 45       Equation

Step 2:

- 16 + t = - 45      Open Parenthises

Step 3:

t = - 45 + 16      Add 16 on both siddes

Answer:

t = - 29

Hope This Helps :)

Answer:

t = -29

Step-by-step explanation:

Step 1: Write equation

-16 - (-t) = -45

Step 2: Solve for t

Simplify: -16 + t = -45Add 16 to both sides: t = -29

Step 3: Check

Plug in t to verify it's a solution.

-16 - (-(-29)) = -45

-16 - 29 = -45

-45 = -45

Duncan is excited to begin diving lessons. He starts on the diving board, 5 feet above the surface of the pool. Then, Duncan dives off the board and ends up 7 feet below the surface of the pool. What is the total distance from Duncan's start on the diving board to his lowest point beneath the surface of the pool?​

Answers

Answer:12

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

100 POINTS!!!!!!!!!!! ( I NEED FAST ANSWERS ) Find the slope of the line that contains the points:(-6, 3) and (-4,5).

Answers

Answer:

slope = -4/5

Step-by-step explanation:

plllsssssssssss I needddd ansswwerss ​

Answers

Answer:

9/4 or 2¼

Step-by-step explanation:

have the number be represented by x2/3s OF x (of means to mulitply); 3 INCREASED BY (increased by means to add); 1/2 OF x (again, of means to multiply)so we can write the equation like this:2/3x=3+1/2xnow we need to get x by itselfmultiply both sides of the equation by 2/1 (the reciprocal of 1/22/3(2/1)=4/3 ; 1/2(2/1)=1now our equation look like 4/3x=3multiply both sides of the equation by 3/4 (the reciprocal of 4/3)4/3(3/4)=1 ; 3(3/4)=9/4x = 9/4 or 2¼

can ya smart people solove ths

Answers

it would equal 1. you need to do pemdas. so first thing add 1+2= 3. next multiply 3 times 2. Lastly divide 6 by 6 which equals 1

Answer:

[See Below]

Step-by-step explanation:

____________________

✦ Solve:

Divide: [tex]6[/tex] ÷ [tex]2=3[/tex]Add: [tex]1+2=3[/tex]Multiply: [tex]3*3=9[/tex]

____________________

So your answer would be:

[tex]\bold9[/tex]

____________________

~Hope this helps Mate. If you need anything feel free to message me.

[tex]-Your~ Friendly~ Answerer,~Shane[/tex]

3.The snow starts at a depth of 10 inches and melts to 2 inches over the span of 4 hours. Determine the rate of change over the interval 0≤x≤4A.4 inches per hour

B.2 inches per hour

C.8 inches per hour

D.12 inch per hour

4.The population in a neighborhood increased from 120 to 156 people from 1990 to 1994. Find the rate of change over the interval 1990≤x≤1994.

A.1/9 of a person per year

B.9 people per year

C.36 people per year

D.4 people per year

5.The temperature increases from 60 degrees Fahrenheit to 84 degrees Fahrenheit from 8 in the morning to 12 in the afternoon. Find the rate of change over the interval 8≤x≤12

A.16 of a degree Fahrenheit per hour

B.4 degrees Fahrenheit per hour

C.6 degrees Fahrenheit per hour

D.24 degrees Fahrenheit per hour

If you answer, answer with all of the questions listed thank you.

Answers

3. B: 2 inches

4. C: 9 people

5. B: 6 degrees

16/7 - 1/14 subtracting fractions

Answers

Answer:

31/14

Step-by-step explanation:

We first need to get common denominators, so we multiply the 16 and the 7 by 2, to get 32/12. Now we can subtract since the fractions have common denominators. After subtracting we get 31/14 or 2 3/14. Hope this helps!

Use the vertical line test to determine whether or not the graph is a graph of a function.

Answers

answer: yes
explanation:
well if you used the vertical line test, then you would know this is a function because there’s no more than 1 point for each vertical line.
*vertical means up and down*

rewrite the expression from part B using the additive inverse that you identified in part C.

Answers

Answer:

12.3 – (-9.6) = 12.3 + 9.6

Step-by-step explanation:

The area A of the rectangle shown
is described with the inequality
60 A 140. Write and solve a
compound inequality for x.

Answers

Step-by-step explanation:

Simplifying

4x + -5 = 20x

Reorder the terms:

-5 + 4x = 20x

Solving

-5 + 4x = 20x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-20x' to each side of the equation.

-5 + 4x + -20x = 20x + -20x

Combine like terms: 4x + -20x = -16x

-5 + -16x = 20x + -20x

Combine like terms: 20x + -20x = 0

-5 + -16x = 0

Add '5' to each side of the equation.

-5 + 5 + -16x = 0 + 5

Combine like terms: -5 + 5 = 0

0 + -16x = 0 + 5

-16x = 0 + 5

Combine like terms: 0 + 5 = 5

-16x = 5

Divide each side by '-16'.

x = -0.3125

Simplifying

x = -0.3125

Which property does this show? 4(3 - x) = 12 - 4x

Answers

Answer:

Distributive property

Step-by-step explanation:

when you distribute the left sid dit equals the right

A(x) = x² +10x - 75
rewrite in factored form

Answers

Step-by-step explanation:

A(x) = x² + 10x -75

= (x + 15)(x - 5)

Answer:

(x+15)(x-5)

Step-by-step explanation:

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