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3 years ago

Find f(-3) f( x) = 2x^2-3x+4

Mathematics

1 answer:

KonstantinChe [14]3 years ago

5 0

Answer:

f(-3)= 2 (-3)² - 3(-3) +4 = 2(9) +9+4=18+9+4= 31

I hope I helped you^_^

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Select the equations that are correct.mark all that apply.

allsm [11]

Answer:

17,550÷65=270 Correct

11,196÷12=933 Correct

11,712÷96=122 Correct

Step-by-step explanation:

17,550÷65=270 Correct

11,196÷12=933 Correct

29,365÷35=677 Incorrect

11,712÷96=122 Correct

4 0

3 years ago

Nathan is buying a cell phon for his business. Thr regular price of the cell phone is $179. If he buys the phone in the next 2 w

NikAS [45]

Answer:

$143.2

Step-by-step explanation:

20% of 179 is 35.8

so 179-35.8 = 143.2

5 0

3 years ago

Write the coordinate of the intercept

Basile [38]

Answer:

m = 2/3

y-intercept: 2

Explanation:

First convert this equation into standard form by distributing the 6y and -4x from the coefficient of 2, and then putting the variables in order.

This equation should be in the form: Ax + By = C (Standard form)

y = -Ax/B + C/B : y = mx + b (Slope intercept form)

2(6y - 4x) = 24 → 12y - 8x = 24

→ -8x + 12y = 24 → -8x = -12y + 24 → 8x = 12y - 24 → 8x - 12y = -24

8x - 12y = -24

| | |

A B C

Once you have standard form, you are ready to convert this into slope intercept by isolating the y completely.

8x - 12y = -24

-8x -8x

(First through the subtraction property of equality, remove 8x from both sides so that -12y is by itself on the left)

-12y = -8x - 24

×-1 ×-1 ×-1

(Through the identity property of negative 1, remove the negative sign from all of the numbers because a negative times a negative is a positive)

12y = 8x + 24

(Lastly, through the division property of equality, divide all sides by 12 because it is the coefficient of y, which will solve for the variable)

8 0

2 years ago

In a population distribution, a score of x=57 corresponds to z=-0.25 and a score of x=87 corresponds to z=1.25. Find the mean an

Serggg [28]

Here is dependence between scores and x-values:

$Z_i=\dfrac{X_i-\mu}{\sigma},$

where $\mu$ is the mean, $\sigma$ is standard deviation and i changes from 1 to 2.

1. When i=1, $Z_1=-0.25,\ X_1=57,$ then

$-0.25=\dfrac{57-\mu}{\sigma}.$

2. When i=2, $Z_2=1.25,\ X_2=87,$ then

$1.25=\dfrac{87-\mu}{\sigma}.$

Now solve the system of equations:

$\left\{\begin{array}{l}-0.25=\dfrac{57-\mu}{\sigma}\\ \\1.25=\dfrac{87-\mu}{\sigma}.\end{array}\right.$

$\left\{\begin{array}{l}-0.25\sigma=57-\mu\\ \\1.25\sigma=87-\mu.\end{array}\right.$

Subtract first equation from the second:

$1.25\sigma-(-0.25\sigma)=87-57,\\ \\1.5\sigma=30,\\ \\\sigma=20.$

Then

$1.25=\dfrac{87-\mu}{20},\\ \\87-\mu=25,\\ \\\mu=87-25=62.$

Answer: the mean is 62, the standard deviation is 20.

3 0

3 years ago

Read 2 more answers

3 more than a number is greater than 27

maw [93]

Answer:

9 because 27 divided by 3 is 9

6 0

3 years ago

Read 2 more answers