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3 years ago

Evaluate 3x^2 – 4 when x = 2.

Mathematics

2 answers:

polet [3.4K]3 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

Therefore, C ) 8.

Mashcka [7]3 years ago

3 0

When x = 2
3x^2 = 3*4 = 12
12-4 = 8
C. is the answer

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Write 125 as a product of primes. Use index notation when giving your answer.

Mnenie [13.5K]

Answer:

5^3

Step-by-step explanation:

125= 5*25

25=5*5

5 is a prime number and there are 3 of them so the answer in index notation will be 5^3

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2 years ago

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cricket20 [7]

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1 year ago

Let a=3/5 and let b=2/3. Compute a^2b^-3.

Amanda [17]

Answer: 81/100

Step-by-step explanation:

I don't guarantee you I am right but..

first, solve for the exponents after substituting the numbers in

3/5 x 3/5 is 9/25

since b's exponent is negative, you change the fraction into its reciprocal and then do it with the exponent but positive

2/3^-3 to 3/2^3 and 3/2 x 3/2 is 9/4

then you mutiply both numbers to get 9/4 x 9/25 is 81/100

7 0

1 year ago

Henry cut a piece of yarn that was 11/6 feet long into two pieces lost two different pairs of fractions that could show the leng

pishuonlain [190]

I need help on that to. We have a test tomorrow and I can't figure it out and I need help:(

3 0

3 years ago

A rocket is launched from the ground and travels in a straight path. The angle of inclination of the rocket's path is 1.2 radian

gladu [14]

Answer:

a) $S=2.57$

b) $H=203.2yard$

c) $X=121.79yards$

Step-by-step explanation:

From the question we are told that:

Angle $\theta=1.2=68.755^o$

Generally the equation for Slope is mathematically given by

$S=tan \theta$

$S=tan 68.755$

$S=2.57$

Given the right Angle triangle with horizontal distance $x=85yard$

Generally the equation for Height traveled is mathematically given by

$H=tan\theta*x$

$H=2.57*85$

$H=218.45$

$H=203.2yard$

Generally the equation for Horizontal Distance traveled at 313 height traveled is mathematically given by

$X=\frac{313}{tan65.75}$

$X=\frac{313}{2.57}$

$X=121.79yards$

3 0

2 years ago