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Umnica [9.8K]
2 years ago
11

Pre-calc Evaluate f(2) using substitution: f(x) = 2x^3 – 3x^2– 18x-8

Mathematics
1 answer:
krek1111 [17]2 years ago
8 0

Answer:

f(2) = -40

Step-by-step explanation:

Just substitute x=2 into the function:

f(x) = 2x³ - 3x² - 18x - 8

f(2) = 2(2)³ - 3(2)² - 18(2) - 8

f(2) = 2(8) - 3(4) - 36 - 8

f(2) = 16 - 12 - 44

f(2) = 4 - 44

f(2) = -40

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Write an expression with two terms. One term should have a coefficient with a variable and the other term should be a constant.
soldier1979 [14.2K]

Answer:

See Explanation

Step-by-step explanation:

Let us briefly explain the terms

  • Variable: This is the letter in the expression
  • Coefficient: This is the number beside the letter above
  • Constant: This is a number without any variable attached.

Let us take our expression with two terms to be: 3x+5

Coefficient =3

Variable =x

Constant =5

The word phrase of the expression is:

5 added to the product of 3 and a number.

3 0
3 years ago
Evaluate
pochemuha

Answer:

  f(0) = 1/2

Step-by-step explanation:

At x=0, the inequality tells you ...

  1/2 ≤ 1 -f(0) ≤ 1/2

That is, ...

  1 - f(0) = 1/2

  f(0) = 1/2

  \boxed{\lim\limits_{x\to 0}{f(x)}=\dfrac{1}{2}}

6 0
3 years ago
Um yeah I'm kinda slow sooo can sm body help me.What is 10% of 15.8?​
MA_775_DIABLO [31]

Answer:

1.58

Step-by-step explanation:

15.8 x 0.1= 1.58

7 0
3 years ago
Read 2 more answers
Which of the following are solutions to the equation below? Check all that apply. 4x2 - 12x + 9 = 5​
Anika [276]

Step-by-step explanation:

4x² - 12x + 9 = 5 → 4x² - 12x + 4 = 0 → x² - 3x + 1 = 0

∆ = b² - 4ac → ∆ = (-3)² -4(1)(1) = 9 - 4 = 5

x = (-(-3) ± √5)/2(1) = (3 ± √5)/2

x² - 3x + 1 = 0 → (x - 3/2)² - 9/4 + 1 = 0 → (x - 3/2)² = 5/4 → x - 3/2 = ±√5 / 2 → x = ½( 3 ± √5)

4 0
3 years ago
Please help me. I need help
koban [17]
I am pretty sure the answer would be -.02
Bc you would do 2-3.6/5- -3
3 0
3 years ago
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