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
Serhud [2]
2 years ago
12

If f (x) = x2 + 3x – 2 , find f (-2). PLEASE HELP!

Mathematics
1 answer:
stira [4]2 years ago
8 0

Answer:

f(- 2) = - 4

Step-by-step explanation:

Step-by-step explanation:

To evaluate f(- 2) substitute x = - 2 into f(x) , that is

f(- 2) = (- 2)² + 3(- 2) - 2 = 4 - 6 - 2 = - 4

You might be interested in
This is the other part of the question that I need help on.
coldgirl [10]
7x+(x+20)=180
Just simplify. Hope this helped:)
4 0
3 years ago
What is the slope an y-intercept of the graph​
Aneli [31]

Answer:

D)

Step-by-step explanation:

the slope is 4 and intercept is 2

7 0
3 years ago
Read 2 more answers
Find the unit rate. A 6oz jar of jalapeños cost $2.34
Levart [38]

Answer:

1oz cost $0.39 which will be the unite rate

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is 392,153 rounded to the nearest ten thousand
Alchen [17]

Step-by-step explanation:

392,153 rounded to the nearest ten thousand is 390,000

3 0
2 years ago
Read 2 more answers
can someone please help me figure this out? this is a summative and I'm failing for the year. it's algebra 1. ​
34kurt

Part (a)

  • x = number of bass caught
  • y = number of trout caught

x and y are nonnegative whole numbers.

3x represents the total weight of all the bass, since one bass weighs 3 pounds. Similarly, 2y is the total weight of the trout with each one being 2 pounds.  Adding up all the weight of all the fish, we get 3x+2y. This is set equal to 34 pounds which is the total stated weight caught.

In short, we end up with the equation 3x+2y = 34

Now onto the second equation. The expression 5x represents how many points Pat gets from catching x bass, because he gets 5 points per bass. Then we subtract off 2y to represent Pat losing 2 points per trout he catches. Overall, his point total is 5x-2y. This is set equal to his point total of 14.

The second equation is 5x-2y = 14

------------

Answer:

3x+2y = 34

5x-2y = 14

Both equations are needed to form this particular system.

===================================================

Part (b)

We could use a number of methods to solve for (x,y). Possibly the most efficient is elimination. Why? Because note how we have 2y up top and -2y down below. They add to 0y which is just 0. The y terms go away, and are eliminated. Afterward, all we're left with is x in which we can solve for just like any other single variable equation. More info is in part (c).

===================================================

Part (c)

Refer to the answer in part (a). We'll add straight down. So that means we have these three sets of addition operations.

  • 3x+5x becomes 8x
  • 2y + (-2y), aka 2y-2y, becomes 0y and the y terms go away
  • 34+14 simplifies to 48

After those three sets of addition operations, we're left with the much simpler equation 8x = 48. To solve this, we divide both sides by 8 and we get x = 6. This says Pat caught 6 bass.

Use this value of x to find y. So we'll plug x = 6 into either equation involving x,y and solve for y

3x+2y = 34

3(6)+2y = 34

18+2y = 34

2y = 34-18

2y = 16

y = 16/2

y = 8

So we can see that Pat caught 8 trout as well.

The check portion is shown in the attached image below. Effectively, all we're doing is replacing x and y with 6 and 8 respectively. Then we're simplifying both sides. Getting the same number on both sides results in a true equation, and therefore verifies we have the correct (x,y) solution.

Solution: (x,y) = (6,8)

Interpretation: Pat caught 6 bass and 8 trout

7 0
3 years ago
Other questions:
  • Solve the formula P = 2l + 2w for w. Ive been stuck on this one.
    12·2 answers
  • Simplify the expression.
    12·1 answer
  • What’s 2x+y=4 in slope intercept form
    12·2 answers
  • What is the answer 2+2*3+2*2+4=​
    9·2 answers
  • 5.) Solve 2x–71 = 12. Be sure to show all of your work.
    13·2 answers
  • Beverly moved into an apartment close to her new job. She will be paying $1,800 per month in rent and expects a 3% rent increase
    9·1 answer
  • Fill in each box with the correct number or variable.
    13·1 answer
  • There are 1200 students at a school and 390 of them are boys if each classroom holds 30 students how many classrooms are needed
    13·1 answer
  • Pleasesolve thank you ​
    9·1 answer
  • Can someone produce SPSS results by including the the intercept (a.k.a. the constant), standard error of estimate, unstandardize
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!