Mathematics College

Evaluate f(-2) for the function f(x)= -1/2x^2 + x + 1

Answers

Answer 1

Answer:

f(-2) = -3

Step-by-step explanation:

[tex]f(x)=-\frac{1}{2} x^{2} +x+1[/tex]

Just plug in x = -2

[tex]f(-2)=-\frac{1}{2} (-2)^{2} -2+1[/tex]

[tex]f(-2)=-\frac{1}{2} (4) -1[/tex]

4 can be rewritten as [tex]\frac{4}{1}[/tex] or [tex]\frac{8}{2}[/tex] so it has a common denominator.

[tex]f(-2)=-\frac{1}{2} * \frac{8}{2} -1[/tex]

[tex]f(-2)=-\frac{4}{2} -1[/tex]

[tex]f(-2)=-2-1[/tex]

[tex]f(-2)=-3[/tex]

Related Questions

Leo bought 18 boxes of cereal. This is 25% of the boxes at the store. How many total boxes of cereal were at the store?

Answers

Answer : There were 72 boxes at the store.
72 boxes at the store

What is the image point of (-4,-3)(−4,−3) after a translation left 1 unit and down 2 units?

Answers

9514 1404 393

Answer:

  (-5, -5)

Step-by-step explanation:

After adding (-1, -2) to the coordinates, the image point is ...

  (-4, -3) +(-1, -2) = (-5, -5)

If LN = 6x - 5, LM = x + 7, and MN = 3x + 20, find MN

Answers

Answer:

68

Step-by-step explanation:

LM   +    MN     =   LN

x + 7  + 3x + 20 = 6x - 5

           4x + 27 = 6x - 5

          -4x         -4x      

                   27 = 2x - 5

                    +5        +5

                   32  = 2x

                   ÷2   ÷2    

                    16 = x

MN: 3x + 20

      3(16) + 20

        48   + 20

              68

0.06/ 0.5334 Find the quotient

Answers

Answer:

the answer is 0.11248593

Step-by-step explanation:

f(x)=-2x+4
what is x when f(x)=-8

Answers

f(-8)=-2(-8)+4
f(-8)=16+4
f(-8)=20

Answer:

20

Step-by-step explanation:

f(x) = -2 (x) + 4 (substitute x for the given value)

f(x) = -2 (-8) + 4 (multiply -2 and -8)

f(x) = 16 +4 (add 16 and 4)

f = 20

Find the value of expression for (3.4) to the power of 2 show your work.

Answers

Answer:

11.56

Step-by-step explanation:

Margie walked 3.75 miles on Tuesday morning. On Wednesday morning, she walked 1.2 times as far as she did on Tuesday. How far did she walk on Wednesday?

Answers

4.5 ? not entirely sure but seems simple just multiply 3.75 by 1.2

Carter's football team played 10 games this season. They won only 20% of their games. How many games did Carter's team lose?

Your answer:

Answers

the answer is eight (8)

You and a friend take pictures at a motocross event. Your camera can take 24 pictures in 3.75 seconds. Your friend's camera can take 36 pictures in 4.5 seconds. Evaluate the expression (36 divided by 4.5)/(24 divided by 3.75) to find out how many times faster your friend's camera is than your camera. *

Answers

Answer:

1.25

Step-by-step explanation:

use the equation given

WILL MARK BRAINLIST!!!

Sabrina's average speed was 8 miles per hour during the first half of her bike ride. She increased her average speed to 16 miles per hour during the second half of her bike ride. What percentage represents the increase in Sabrina's average speed during her bike ride?

A. 50%

B. 80%

C. 100%

D. 200%​

Answers

D. 200%

if 8 is a whole (100%) and 16 is twice of that, you can conclude that her speed increased by 200%

I just need help filling in the rest of this table. I've done some, but I've been stuck for a while now. Huge thanks to anyone who can help!

Answers

Answer:

i think 20 is above 12 and 17 under 30 and 36 is on top of 20 the rule is .50(x) +2

Answer:

Step-by-step explanation:

c = 0.5t + 2

12 = 0.5t + 2 ⇒ 0.5t = 10 ⇒ t = 20

c = 0.5(30)  + 2 ⇒ c = 17

20 = 0.5t + 2 ⇒ 0.5t = 18 ⇒ t = 36

Two-thirds of the sum of three times a number and six is ten what is the number ?

Answers

Answer:

X=3

Step-by-step explanation:

2/3*(3x+6)=10

2x+4=10

X=6/2

x=3

WILL GIVE BRAINLIEST

Answers

Answere:

its black

Step-by-step explanation:

black is better and im right

Find x if a = 13 and C = 47.

Answers

Answer:45.167

Step-by-step explanation:

So you're using the Pythagorean theorem which is a^2 + b^2 = c^2... so if you don't have b you can manipulate the equation. That equation is c^2 - a^2= b^2, so you square 47 which is 2209 and then square 13 which is 169... you do 2209-169 and that equals 2040, then you do the square root of that which is 45.166359 that can be simplified to 45 or two decimal points 45.167. Hope that Helped! :)

whats 2+2 i honestly dont know

Answers

Answer:4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

say you have 2 cookies then get 2 more then you have 4

x = -11 + 7y
5x + 2y = -18

Answers

Answer:

x = -4

y = 1

(-4,1)

Step-by-step explanation:

x = -11 +7y

5x + 2y = -18

This is a Substitution problem, so you put x = -11+7y into 5x+2y = -18

5(-11 +7y)+2y = -18

5(-11) = -55

5(+7y) = 35y

-55+35y+2y = -18

Now you add 35y and 2y which gives you 37y

-55+37y = -18

Now you add +55 from -55 and -18

37y = 37

You divide each side by 37 so that y = 1

Now you plug y(1) into the equation x = -11+7y

x = -11+7(1)

-11+7 = -4

x = -4

B gn nonnegotiable BMI Brock chambers k cancel j click chilling connect m BLM

Answers

Answer:

what?

Step-by-step explanation:

free points...thanks?


Denominator of the fraction
2/5.

Denominator of the fraction 13/16.

This is a 20 point question must answer both plzzz plus Brainly

Answers

Answer:

Denominator for 2/5 is 5, and denominator for 13/16 is 16.

A group of friends receives a dinner bill for $87.50. The sales tax rate is 5%. They want to leave a 15% tip on the total bill after tax. How much money will they pay for their dinner with tax and tip?

First to answer get brainliest

Answers

A. $105

B. $105.63

C. $105.66

D. $105.88

Answers

Answer:

C 105.66

Step-by-step explanation:

Answer:

105.66

Step-by-step explanation:

Tim can swim 150 meters in 6 minutes.
How long will it take him to swim 400 m?

Answers

Answer:

Step-by-step explanation:

150/6 = 25. that is your unit rate

400/25= 16 minutes

Your answer is 16 minutes because for every minute Tim can swim 25 meters and 400 divided by 25 is 16.

Help! Got it wrong after trying first time and need helppp !

Answers

We are given the equation:

DA - 2qA = B³

Taking 'A' common on the LHS

A(D - 2q) = B³

Dividing both sides by (D - 2q)

A = B³ / (D - 2q)

Solve for x by answering the number below/

Answers

X = 5.

2(5)+8=4(5)-2
18=18

Answer:

The value of x is 5.

Step-by-step explanation:

In a square, all sides are equal so you can compare the expressions to solve x :

[tex]4x - 2 = 2x + 8[/tex]

[tex]4x - 2x = 8 + 2[/tex]

[tex]2x = 10[/tex]

[tex]x = 5[/tex]

Quadrilaterals and other polygons

Answers

Answer:

B

Step-by-step explanation:

I got B too and I got it right on my test

simplify \sqrt{25a^2}

Answers

Answer:

Step-by-step explanation:

Sqrt(25a^2)

Sqrt((5a)^2)

5a

Which of the following uses the reciprocal property to rewrite
16/24 = 56/x?

1: 24/16 = x/56
2: 24/x = 56/24
3: 24/16 = 56/x
4: 16/24 = x/56​

Answers

Answer:

1

Step-by-step explanation:

All you do is flip the numbers and you get 24/16 = x/56

Hope I helped :)

Find f (x )if f apostrophe apostrophe (x )equals x to the power of negative 2 end exponent comma space x greater than 0 comma space f (1 )equals 0 and f (2 )equals 0.

Answers

Step-by-step explanation:

Given [tex]g'(x) = g^{-2}, x> 0\ g(1) = 0 \ and \ g(2) = 0[/tex]

To get g(x), we will have to integrate g'(x)

[tex]g(x) = \int\limits {x^{-2}} \, dx\\ g(x) = \frac{x^{-2+1}}{-2+1} + C\\ g(x) = -x^{-1} + C\\g(x) = -x^{-1} + C\\[/tex]

If g(1) = 0, this means at x = 1, g(x) = 0

0 = -1⁻¹ + C

C= 1

Substitute C = 1 into the function

g(x) = -x⁻¹ + 1

If g(2) = 0, this means at x = 2, g(x) = 0

0 = -2⁻¹ + C

C= 2⁻¹

C =  1/2

Substitute C = 2 into the function

g(x) = -x⁻¹ + 1/2

Pls help;)))))))))))))))(

Answers

Answer:

Option 2)

Step-by-step explanation:

In a function, any number can be an x-coordinate only once.

Option 1) The 2 appears twice as x.

Option 2) All x-coordinates are different.

Option 3) The 2 appears twice as an x-coordinate.

Option 4) The 3 appears twice as an x-coordinate.

Answer: Option 2)

A) -60
B) -30
C) -10
D) 10

Answers

Answer:

B) -30

Step-by-step explanation:

multiply -20 by 3/2 to solve for x

Which equation is the inverse of the function
CO B 2 ☺ ☺
g(n)= -5n+2
A) g - (n)
--n+
6
1
3
B) g(n) = 1+-n
2
2
C) g(n)= -1+2
3
5
D) g(n) = -51 + 19
4
a
b

Answers

Here you go! Hope this helps

The ratio of green apples to red apples at a grocery store is 2 to 3. There are 78 red apples at the grocery store. What is the total number of apples at the store?

Answers

Answer:

52

Step-by-step explanation:

78 divided by 3 is 26

26 times 2 is 52

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