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AnnyKZ [126]
3 years ago
15

What is the factorization of 2x^2+9x+9

Mathematics
1 answer:
iogann1982 [59]3 years ago
6 0

Answer:

(2x+3)*(x+3)

Step-by-step explanation:

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A swimming pool already contains
xenn [34]

Answer:

Rate of change = <u>3 gallons/minute</u>

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Step-by-step explanation:

A graph of the pool's water level would be useful.  The slope of the line would represent the rate of change for filling the pool.  It will also help us determine the amount of water that was in the pool to start.  Although it is tempting to say the rate of fill is 45gallons/5 minutes, or 9 gallons/minute, it is not correct.  The pool already started with an unknown volume of water.  The rate of change after 5 minutes, however, can be used.  The problem states it is being added at a constant rate.  Let's find an equation for a line, in the format of y=mx+b, where m is the slope (rate of change) and b is the y-intercept.

We'll let y represent the volume of water in the pool, and x will be the time in minutes.  The y-intercept will give us the amount of water in the pool at the start (x = 0).

The slope can be determined between the two given points:

(5,45) and (30,120):

Slope = Rise/Run [The change in y divided by the change in x].

Rise = (120 - 45) = 75

Run = (30-5) = 25

Slope = 75/25 or 3

The line, so far, becomes y=3x + b

The slope of <u>3 has units of gallons/minute.  It is the rate at which the pool is being filled.</u>

We can find b, the starting volume of water, by using one of the two points in the equation and solving for b:

y=3x + b   [I'll use (5,45)]

45 = 3*(5) + b

<u>b = 30 gallons</u>

<u>The pool had 30 gallons to start (at x = 0(minutes))</u>

See the graph of the line, attached.

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Answer:

1) is equivalent multiply by 6

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3 years ago
The town recreation committee raised money to increase the circumference of the jogger’s park, which was initially 1000 feet. It
yawa3891 [41]

Answer:C. 3000 ft

Step-by-step explanation:

First, find the radius of the circumference.

By dividing 1000 ft by 2, which is 500, and that is the radius.

Then you multiply the radius by 3, which is 1500.

Finally, you want the circumference, to find the circumference you need to multiply the radius by 2, which is 3000 ft.

That’s it.

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