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
elena-14-01-66 [18.8K]
4 years ago
13

Evaluate 3x^2 – 4 when x = 2.

Mathematics
2 answers:
polet [3.4K]4 years ago
7 0

Answer:

C ) 8.

Step-by-step explanation:

Given: 3x^2 – 4 when x = 2.

To find: Evaluate.

Solution: We have given that 3x²– 4

For x =2.

3(2)²– 4.

On solving the power of 2.

3 (4) - 4.

12 - 4 .

On subtracting 4 form 12

8

Therefore, C ) 8.

Mashcka [7]4 years ago
3 0
When x = 2
3x^2 = 3*4 = 12
12-4 = 8
C. is the answer
You might be interested in
You earn 15n15n dollars for mowing nn lawns. how much do you earn for mowing one lawn? seven lawns?
kvasek [131]
You earn $15.00 for mowing one lawn.
15*7=105
You earn $105.00 for mowing 7 lawns.
6 0
4 years ago
How many 6-digit numbers can be created using8, 0, 1, 3, 7, and 5 if each number is used only once?
Ludmilka [50]

Answer:

600 numbers

Step-by-step explanation:

For six-digit numbers, we need to use all digits 8,0,1,3,7,5 each once.

However, 0 cannot be used as the first digit, because it would make a 5-digit number.

Therefore

there are 5 choices for the first digit (exclude 0)

there are 5 choices for the first digit (include 0)

there are 4 choices for the first digit

there are 3 choices for the first digit

there are 2 choices for the first digit

there are 1 choices for the first digit

for a total of 5*5*4*3*2*1 = 600 numbers

6 0
3 years ago
1. 8y = 48<br> 2. q — 12 = 1<br> 3. 18 = a/2<br> 4. r/3 = 7<br> 5. 11 = m — 4
Nookie1986 [14]

Hello!

1. 8y = 48 => y = 48 : 8 => y = 6

2. q - 12 = 1 => q = 1 + 12 => q = 13

3. 18 = a/2 => a = 18 × 2 => a = 36

4. r/3 = 7 => r = 3 × 7 => r = 21

5. 11 = m - 4 => m = 11 + 4 => m = 15

Good luck! :)

6 0
3 years ago
The kinetic energy (in joules ) of a moving object can be calculated from the expression 1/2mv to the second power, where m is t
yulyashka [42]

E = 1/2 m v^2

E = 1/2 (0.145) (40)^2

E = 0.0725 x 1600

E = 116 kg m^2/s^2

1 joule = 1 kg m^2/s^2

so here E in joules is 116 joules

so E = 116 joules

7 0
3 years ago
What is 3 1/2 X 2 X 9 1/3
enot [183]
Answer: 21

Steps: Convert the mixed number to an improper fraction and Reduce the numbers with the greatest common factor

- 7/2 * 2 * 3

Reduce the numbers with the greatest common factor

7 * 3

Answer = 21
7 0
3 years ago
Other questions:
  • Create a equation using this graph?
    15·1 answer
  • The graph shows f(x)=2x+1 and g(x)=3x.
    13·1 answer
  • Round 0.92731 to the nearest thousandths place
    12·1 answer
  • Please help! I'm geting the wrong answer and i don't know why <br> 8(x + 1) - 3(x + 4) = 7(2 - x)
    12·1 answer
  • What is the range of the function?
    11·1 answer
  • What is the least possible degree of a polynomial that has the root -3 + 2i, and a repeated root -2 that occurs twice?
    5·1 answer
  • The HCF and LCM of two numbers x and 126 are 24 and 840 respectively. Find the value of x.
    7·1 answer
  • Quiz: Writing an Equation given Attributes (focus, directrix, vertex, or p-value)
    8·1 answer
  • 130 3x + 67 degrees<br>please please please please please please please help​
    12·2 answers
  • Write the slope intercept form of the equation of the line
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!