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Brut [27]
1 year ago
8

Evaluate the expression 2x^3 - 14 when x=2

Mathematics
1 answer:
alexgriva [62]1 year ago
4 0

Answer:

-2

Step-by-step explanation:

2(2)*3-14

4*3-14

12-14

-2

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75 miles in 3 hours ; 140 miles in 4 hours
weeeeeb [17]

Answer:

no

Step-by-step explanation:

75:3=25:1

140:4=45:1

5 0
2 years ago
This is for middle school 8th grade please help me :)
Crazy boy [7]

Answer:

what do you need?

Step-by-step explanation:

I don't see a question.

8 0
3 years ago
During the financial crisis of 2008, the price of a barrel of Brent crude oil fell a high of $140 per barrel to around $50 per b
Andrei [34K]

Answer:

  decrease of 64.3%

Step-by-step explanation:

Percentage change can be calculated from ...

  pct change = ((new value)/(original value) -1) × 100%

  = (50/140 -1) × 100%

  = (-9/14)×100% = -64 2/7% ≈ -64.3%

The price of crude fell about 64.3% in that period.

7 0
3 years ago
Linear pair angles are
guajiro [1.7K]

Answer:

a

Step-by-step explanation:

Linear Pair Angles are always congruent because you can see that the parallel lines are cut by a transversal, which creates special angle pairs. The angles would be Alternate Exterior Angles; angles on opposite sides of a transversal but outside the two parallel lines form supplementary angle pairs. The angles also are Corresponding Angles.

3 0
2 years ago
The volumes of two spheres are in a ratio of 1:8 what is the eatio rafi
Agata [3.3K]
Remark
I take it that you want to know the ratio of the radii. If this is not correct, leave a comment below my answer.

You could do this by giving the spheres a definite volume, like 1 and 8 and then solve for r for one of them and then use the other sphere to find it's radius. It is not exactly the best way, and if you are going to to a physics class you want to be doing this using cancellation. 

Step One 
Set up the Ratio for the volumes.

\frac{V_1}{V_2} =  \frac{1}{8}

Step Two
Setup the equation for V1/V2 using the definition for a sphere. V = 4/3 pi r^3

\dfrac{1}{8} =  \frac{ \frac{4}{3} \pi( r_1)^3 }{ \frac{4}{3} \pi( r_2)^3 }

Step Three
Cancel the 4/3 and pi on the top and bottom of the fractions on the right.

You are left with 1/8 = (r1)^3/ (r2)^3

Step Four
Take the cube root of both sides.
cube root 1/8 = 1/2

Cube root of (r1)^3 = r1
Cube root of (r2)^3 = r2

Step  Five
Answer
\frac{r_1}{r_2} =  \frac{1}{2}   Answer <<<<<<<
8 0
3 years ago
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