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3 years ago

12

A 9,000-gallon pool is being filled at a rate of 40 gallons per minute. At this rate, how many minutes will it take to fill this

pool?

1 answer:

svet-max [94.6K]3 years ago

7 0

4 hours and 15 minutes

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"select all the numbers that are solutions to the equation x^3=27"

Ymorist [56]

B and C

3^3 = 27
the cubed root of 27 is 3

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3 years ago

If x>2,then x2-x-6/x2-4=

statuscvo [17]

$\frac{x^2-x-6}{x^2-4}=(*)\\------------\\x^2-x-6=0\\a=1;\ b=-1;\ c=-6\\\Delta=b^2-4ac;\ \Delta=(-1)^2-4\cdot1\cdot(-6)=1+24=25\\\\x_1=\frac{-b-\sqrt\Delta}{2a};\ x_2=\frac{-b+\sqrt\Delta}{2a}\\\\x_1=\frac{1-\sqrt{25}}{2\cdot1}=\frac{1-5}{2}=\frac{-4}{2}=-2\\\\x_2=\frac{1+\sqrt{25}}{2\cdot1}=\frac{1+5}{2}=\frac{6}{2}=3\\\\x^2-x-6=(x+2)(x-3)$
$---------------------\\x^2-4=x^2-2^2=(x-2)(x+2)\\-------------------\\\\(*)=\frac{(x+2)(x-3)}{(x-2)(x+2)}=\frac{x-3}{x-2}$

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3 years ago

A baby grows 4 inches every 6 months. What is his rate of change?

ser-zykov [4K]

Answer:

4:6 but if you reduce it is 2:3

Step-by-step explanation:

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3 years ago

Y = 2x + 3 2 How does the equation of a line need to be changed to shift the line upward? 1 123 1 -3 -2 -1 -1 -2 A A. The absolu

Jobisdone [24]

Answer:

C

Step-by-step explanation:

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2 years ago

Insert grouping symbols in the expression below so that the value of the expression is 25. Justify your answer.

slava [35]

Have you used PEMDAS if not the abbreviation stands for Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction. So you start with 3² = 3x3 = 9 now 5x6=30 so now you have a equation of (4 + 7 x 9 - 30) = 4 + 63 - 30 = 67 - 30 = 37 I hope I helped!!!!

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3 years ago