2 years ago

Find f(–2) for the function f(x) = 3x2 – 2x + 7.

Mathematics

2 answers:

Natasha_Volkova [10]2 years ago

8 0

The correct answer is: 23

Explanation:

Given function:

$f(x) = 3x^2 - 2x + 7$ ---- (A)

f(-2) means that we have to put x = -2 in equation (A):

$f(-2) = 3(-2)^2 - 2(-2) + 7 \\ f(-2) = 3*4 + 4 + 7 \\ f(-2) = 12+4+7 \\ f(-2) = 23 \\$

Hence the correct answer is: f(-2) = 23.

Setler [38]2 years ago

4 0

The correct answer is 23

You might be interested in

y is directly proportional to the positive square root of x when x = 9, y= 12 find y when x =1/2

ehidna [41]

Y =k√x

12 = 3k

k = 4

now X = 1\2

y = 4√1/2

y = 2√2

6 0

3 years ago

Read 2 more answers

What is the slope of the line that passes through the pair of points (1/3, -1) and ( -2, 9/2)

UkoKoshka [18]

Answer:

$\boxed{m = - \frac{33}{14} }$

Step-by-step explanation:

Use the form below

$\boxed{\boxed{m = \frac{y_2 - y_1}{x_2 - x_1} }}$

Where

$m$ is a slope
$(x_1,~y_1)$ and $(x_2,~y_2)$ are the point of the line

So, the slope is

$(\frac{1}{3} ,~ -1) \to x_1 = \frac{1}{3} ~and~y_1 = -1$

$(-2,~ \frac{9}{2} ) \to x_2 = -2~and~y_2 = \frac{9}{2}$

$m = \frac{\frac{9}{2} -(-1)}{-2-\frac{1}{3} }$

$m = \frac{\frac{11}{2} }{\frac{-7}{3} }$

$m = \frac{11}{2} \div (-\frac{7}{3} )$

$m = \frac{11}{2} \times (-\frac{3}{7} )$

$m = - \frac{33}{14}$

Happy to help:)

7 0

3 years ago

Read 2 more answers

If you had 6 5/7 and you have 3/4 away how much do u hav

Cerrena [4.2K]

Answer:

You have 5 27/28

Step-by-step explanation:

6 20/28 - 21/28= 5 27/28
5 27/28

7 0

3 years ago

Read 2 more answers

Find the quotient 7/9 divided by 5/6

Blizzard [7]

7/9 divided by 5/6 = 14/15
in decimal for it would be 0.93

3 0

3 years ago

Twelve subtracted from twelve times a number is 240. What is the number?

vovangra [49]

Answer:

Step-by-step explanation:

Let x = the number

12x-12 = 240

12x = 252

x = 21

5 0

2 years ago