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
kenny6666 [7]
3 years ago
12

Let f(x)= 2x2−3x+8 What is the value of f(-4)?

Mathematics
2 answers:
Ne4ueva [31]3 years ago
5 0

Answer:

52

Step-by-step explanation:

So we have the function:

f(x)=2x^2-3x+8\\

And we want to find f(-4).

To find f(-4), substitute -4 for x. Thus:

f(-4)=2(-4)^2-3(-4)+8

Square:

f(-4)=2(16)-3(-4)+8

Multiply:

f(-4)=32+12+8

Add:

f(-4)=44+8

Add:

f(-4)=52

And we're done!

Our answer is 52.

-Dominant- [34]3 years ago
4 0

Answer:

f(-4)=52

Step-by-step explanation:

We are given the function:

f(x)=2x^2-3x+8

We want to find f(-4), so we must substitute -4 in for x.

f(-4)=2(-4)^2-3(-4)+8

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition and Subtraction.

Evaluate the exponent first.

⇒ (-4)²= -4*-4 = 16

f(-4)=2(16)-3(-4)+8

Multiply 2 and 16.

⇒ 2*16=32

f(-4)=32-3(-4)+8

Multiply -3 and -4.

⇒-3*-4=12

f(-4)=32+12+8

Add the three numbers together.

f(-4)=44+8\\\\f(-4)=52

f(-4) for the function f(x)=2x²-3x+8 is equal to 52

You might be interested in
How do you determine the degree of a polynomial
yawa3891 [41]

Answer:

The degree of a polynomial refers to the highest degree of its individual terms having non-zero coefficients.

Step-by-step explanation:

The degree of a polynomial refers to the highest degree of its individual terms having non-zero coefficients. For example;

A quadratic polynomial is a polynomial of degree 2. This polynomial takes the general form;

ax^{2}+bx+c

where a, b, and c are constants. This is usually referred to as a quadratic polynomial in x since x is the variable. The highest power of x in the polynomial is 2, hence the degree of any quadratic polynomial is 2.

A second example, consider the cubic polynomial;

ax^{3}+bx^{2}+cx+d

The degree of this polynomial is 3.

6 0
3 years ago
Elmer walked 5.4 miles every day. How far did he walk in 11 days?
AURORKA [14]

Answer:

59.4

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Amanda's book bag is 0.10. Some of Amanda's pens are removed and replaced with pink pens. Her book bag still contains a total of
Marta_Voda [28]

Answer:

The number of pink pens can be 19 .

Step-by-step explanation:

Total Number of pens = 20

Let x be the number of pink pens

We are supposed to find If the probability of choosing a pink pen is close to 1, how many pink pens would you expect to see in Amanda's bag

Probability of choosing a pink pen = \frac{\text{Number of pink pens}}{\text{Total Number of pens}}

Probability of choosing a pink pen =\frac{x}{20}

ATQ

\frac{x}{20}≈1

x≈20

So, the number of pink pens can be 19 .

6 0
3 years ago
Helppp plsssss!!Thanks
OlgaM077 [116]

f(x) + g(x) =

                  4x + 3  

       3x^2 + 2x - 4

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

    3x^      +6x     -1


Answer:   3x^      +6x     -1


Either you typed something wrong in the problem or the answer

3 0
3 years ago
I know the answer is no solution but I don't know how to get it☹️ plz help!
Crank
When a linear equation is in the form y = mx + c, the c, or constant, is the intercept on the y axis, meaning it crosses the y axis at (0, 1).

The gradient (1/3 in this case) is how much the y increments (or decrements) per increase of 1 of the value of x.

This would mean that there would be one point at (0, 1), and another at (3, 2). Draw a line from these two points and beyond, and that is the graph sketched.
3 0
3 years ago
Other questions:
  • I will give you the brainlessest if you awnser the following plz and thank you so much
    11·1 answer
  • Which of the following is the best definition of probability?
    5·2 answers
  • A light bulb has a lifetime X that is exponentially distributed with a mean 340 hours. Find the probability that the bulb lifeti
    12·1 answer
  • What is the answer?​
    13·1 answer
  • What line is perpendicular to 1/3
    8·2 answers
  • 2/5 + 1/10= In simplest form<br> A. 3/15<br> B. 5/10<br> C. 1/4<br> D. 1/2
    5·2 answers
  • Mabel worked 6 hours yesterday and 0.57 hour<br> today. How many hours total did she work?
    11·2 answers
  • Question 3
    8·2 answers
  • Anna bought a potted plant online. It cost $3.4 5plus 20% shipping and handling.What was the total cost
    12·1 answer
  • When is it more beneficial to solve a problem involving a proportional relationship using an equation than using a graph?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!