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Alex17521 [72]
3 years ago
11

Evaluate 7x - (2x)2 + x 3 for x = -2.

Mathematics
1 answer:
V125BC [204]3 years ago
7 0

7x - (2x)2 +  {x}^{3}

7x - 4x +  {x}^{3}

3x +  {x}^{3}

3( - 2) +  { (- 2)}^{3}

- 6 +  - 8

- 14

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The average (arithmetic mean) of five different positive integers is 30. What is the greatest possible value of one of these int
geniusboy [140]

Answer:

The Greatest possible value of one of the integer is 140.

Step-by-step explanation:

Given:  The average (arithmetic mean) of five different positive integers is 30.

To find:  What is the greatest possible value of one of these integers?

Explanation: we are given that the arithmetic mean of five  positive integer

                   is 30.

Let the five positive integers are A,B,C,D,E

The arithmetic mean :

                   \frac{A+B+C+D+E}{5} =30.

On multiplying both side by 5.

                       A+B+C+D+E =150.

The least values of A ,B,C and D can be 1 ,2,3,4.

  Then :  1 +2+3+4+E =150

On simplification  10+E =150

On subtraction both side by 10 we get

                      E = 140 .

Therefore, the Greatest possible value of one of the integer is 140.


6 0
3 years ago
Please check if I’m right please
JulsSmile [24]

Answer:

You are absolutely correct.

Step-by-step explanation:

If y represents distance then 2 miles count as distance and if x represents the rate and hours 4 miles per hours is x.

4 0
3 years ago
What is the value of i^3?
Pavel [41]

Answer:

the answer is -i

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A first number plus twice a second number is 4. Twice the first number plus the second totals 20. Find the numbers
pychu [463]

Answer:

The first number is 6

The second number is -1

6+(-2)=4

6*2=12 12+(-1)=11

Step-by-step explanation:


4 0
3 years ago
Find the equation (in terms of x) of the line through the points (-2,1) and (3,5)
masha68 [24]

9514 1404 393

Answer:

  y = 4/5x +13/5

Step-by-step explanation:

The slope is given by the formula ...

  m = (y2 -y1)/(x2 -x1)

  m = (5 -1)/(3 -(-2)) = 4/5

The y-intercept is given by the formula ...

  b = y -mx . . . . for any point (x, y)

  b = 1 -(4/5)(-2) = 1 +8/5 = 13/5 . . . . using the first point

So, the equation is ...

  y = mx +b

  y = 4/5x +13/5

_____

<em>Additional comment</em>

If you have a bunch of these to do, you may want to make a spreadsheet with the formulas built in. Then you can type in the two points and have it spit out the m and b for your equation. Even if you don't use it to <em>do</em> the work, you can use it to <em>check</em> the work.

7 0
3 years ago
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