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
Fiesta28 [93]
3 years ago
8

If f(x) = 3x 2 - x, find f(-2). A: 10 B: 14 C: 38

Mathematics
1 answer:
AleksAgata [21]3 years ago
4 0

Answer:

A

Step-by-step explanation:

3 times -2 is -6

-6 times 2 is -12

-12- (-2) is 10

You might be interested in
I need help with this...
lisov135 [29]

   ln 5
e              =    ?
                                    x
Keep in mind that y=e     and y = ln x are inverse functions of one another.
  ln 5
e       ,  we can drop both the "e" and the "ln 5."  We are left with 5 (answer).
                                                                                        ln 5
Alternatively, we could take the ln of both sides of y = e

which will result in ln y = (ln 5) ln e.  Note that ln e = 1 (these two functions are inverses of one another).

Then we are left with ln y = ln 5.  Dropping the "ln" operator from both sides,

y=5 (same as before).
8 0
3 years ago
How do we create a table of values to help us graph linear equations?​
VashaNatasha [74]

Let's say for example you wanted to graph the linear equation y = 2x+5

At minimum, we'll need 2 points to form this line.

To get any point of the form (x,y), we plug in a number for x to find a corresponding number for y.

For example, replace x with 0 to find that...

y = 2x+5\\\\y = 2(0)+5\\\\y = 0+5\\\\y = 5\\\\

Therefore, x = 0 leads to y = 5. So the point (0,5) is on the line.

Then we repeat this process for other x values. Let's try x = 1

y = 2x+5\\\\y = 2(1)+5\\\\y = 2+5\\\\y = 7\\\\

Telling us that (1,7) is also on this line. We have enough to graph this equation. Plot the two points (0,5) and (1,7). Then draw a straight line through them. Extend this line as far as you can to the left and right. The graph is shown below.

We can keep going to get other points like (2,9) and (3,11) and (4,13) and so on. A table is a way to keep track of the xy values.

\begin{array}{|c|c|}\cline{1-2}\text{x} & \text{y}\\ \cline{1-2}0 & 5\\ \cline{1-2}1 & 7\\ \cline{1-2}2 & 9\\ \cline{1-2}3 & 11\\ \cline{1-2}4 & 13\\ \cline{1-2}\end{array}

Each time x goes up by 1, y goes up by 2. This directly ties to the slope of 2/1 = 2.

6 0
3 years ago
Juan bought a laptop for 650 and a power adapter for 59 if the sales tax rate is 6% what was the total tax that juan paid
Karolina [17]
Laptop's sale tax
=6/100 x 650
=39


Power adapter's sale tax
=6/100 x 59
=3.54

Total Sales tax=
39+3.54
=42.54
8 0
3 years ago
Clair has250 pennies some pennies are in a box the rest are in her bankthere are more then 100 pennies in each place how many pe
9966 [12]

Answer:

In each place there must be more 100 pennies, but as the total 250 pennies, there are several ways that the money is distributed.

Because there may be 101 pennies in the box and 149 pennies in the bank, but it can also be the opposite; in the box 149 pennies and in the bank 101 pennies.

Therefore, there are many options to answer the question, as long as it is met that there are more than 100 pennies in one place.

8 0
3 years ago
Use the Pythagorean Theorem to find the distance
docker41 [41]

Answer:

About 10.05

Step-by-step explanation:

The change in x is 1, so the bottom line is a length of 1. The change in y is 10, so the right line is 10. Since a^2+b^2=c^2, 1^2+10^2=101, and the square root of 101 is about 10.05.

7 0
2 years ago
Other questions:
  • Measurement is ___________ when it yields the same values across repeated measurement of the same event.
    9·1 answer
  • find the probability of having 2,3, or 4 successes in five trials of a binomial experiment in which the probability of success i
    12·1 answer
  • A bicycle company has designed and built a new model of sports bicycle. They have determined that the profit for the sale of the
    12·1 answer
  • Help will upvote brainliest
    10·2 answers
  • Ok please help i might put 50 for this one
    7·1 answer
  • Answer the following questions CORRECTLY I will know if this is wrong. I WILL REPORT ANY INCORRECT ANSWERS!
    12·2 answers
  • in last weeks volleyball game Ashley served 15 times and made 2 errors. What was her serving percentage? (what percent did she s
    10·1 answer
  • Need help with the answer
    15·1 answer
  • Guadalupe can do a job in 15 hours. If she works with lan, together they can get the job done in 10 hours. How long would it tak
    9·1 answer
  • Max is using a hose to fill an above ground swimming pool, which is shaped like a rectangular prism. the pool is 7meters long an
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!