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Fynjy0 [20]
3 years ago
6

11. Find the average rate of change of the equation y = x2 + 4x + 1 on the interval -1 < x < 4.

Mathematics
1 answer:
coldgirl [10]3 years ago
7 0

Answer:

31/5

Step-by-step explanation:

[f(4) - f(-1)] / 4-(-1)

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A rock is thrown from the top of a tall building.The distance in feet between the rock and the ground t seconds after thrown is
marusya05 [52]

Answer:

0.448 seconds

Step-by-step explanation:

d = -16t² -4t + 412

find t when d = 407

substituting d = 407 into the equation:

407 = -16t² -4t + 412 (subtract 407 from both sides)

-16t² -4t + 412 - 407 = 0

-16t² -4t + 5 = 0 (multiply both sides by -1)

16t² + 4t - 5 = 0  

solving using your method of choice (i.e completing the square or using the quadratic equation), you will end up with

t = (-1/8) (1 + √21)= -0.70 seconds (not possible because time cannot be negative)

or

t = (-1/8) (1 -√21) = 0.448 seconds (answer)

4 0
3 years ago
4x-2=3x+4 solve this
Sunny_sXe [5.5K]

Answer:

Step-by-step explanation:

x=6

8 0
3 years ago
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Step-by-step explanation:

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8 0
2 years ago
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5 0
3 years ago
The area of a rectanglular sandbox is (5x + 40) feet. Factor 5x + 40 to find possible dimensions of the sandbox
kotegsom [21]
5x+40 factors to 5(x+8). Notice how distributing the 5 back through to each term in the parenthesis gives
5 times x = 5x
5 times 8 = 40
So 5*(x+8) = 5*x+5*8 = 5x+40

Therefore, the factors are 5 and (x+8).
The dimensions of the sandbox are 5 feet by (x+8) feet.

We don't know the numeric value of (x+8) since we don't know the value of x, so we leave it as is. 
6 0
3 years ago
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