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2 years ago

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Jonathan used completing the square to find the maximum value of the quadratic expression -x^2 - 4x + 1. What is the maximum val

ue of the expression, and at what x value does it occur?

1 answer:

drek231 [11]2 years ago

6 0

Answer:

Maximum value of the expression = 5

X value it occurs at = 2

Step-by-step explanation:

Please view the image I provided.

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An oil tank has to be drained for maintenance. The tank is shaped like a cylinder that is 4 ft long with a diameter of 2.2 ft. S

gavmur [86]

Answer:

$8\:\mathrm{minutes}$

Step-by-step explanation:

The volume of a cylinder is given as:

$r^2\cdot\pi\cdot h$

Since the diameter is $2.2$ , the radius is $\frac{2.2}{2}=1.1$ .

Therefore, the volume of this cylinder is:

$1.1^2\cdot 3.14\cdot 4=15.1976\:\mathrm{ft^3}$ , using $\pi=3.14$ as requested in the problem.

Since the tank is emptied at a constant rate of $1.5\:\mathrm{ft^3\:per\:minute}$ , it will take

$\frac{15.1976}{1.5}=7.5988=\fbox{$8\:\mathrm{minutes}$}$ to empty the tank.

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2 years ago

Iv) a) 4x 10² solve it in decimal

qwelly [4]

40.0*10 is the answer

actually it is 400 but u want in decimal so it is 40.0*10

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Find the domain and range of the relation.<br> {(3,-2) (2,1) (-1,0) (1,3)}

svp [43]

The domain of the inverse of a relation is the same as the range of the original relation. In other words, the y-values of the relation are the x-values of the inverse.

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2 years ago

About how much would it have cost

Anton [14]

It would cost about $.50 because $8.15 rounds to $8.00, and 8/16 = 0.5

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finlep [7]

I wasn't sure what properties the assignment was looking for... Let me know if you have any other questions!

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2 years ago