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allochka39001 [22]
3 years ago
11

It’s a math problem (khan academy)

Mathematics
1 answer:
leva [86]3 years ago
8 0

The mean is 3 fish per day.

(0+3+6) = 9

9/3 = 3

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The functions below represent the amounts of water released from two reservoirs over x weeks:
solong [7]

Answer:

  • h(x) = -2x^2 -x +3
  • Reservoir A releases the same amount of water as Reservoir B over 1 week

Step-by-step explanation:

<u>Given</u>:

  f(x) = x^2 -7x +5

  g(x) = 3x^2 -6x +2

  h(x) = f(x) -g(x)

<u>Find</u>:

  h(x)

  h(1)

<u>Solution</u>:

The expression for h(x) is found by evaluating its definition:

  h(x) = (x^2 -7x +5) -(3x^2 -6x +2)

  h(x) = x^2(1 -3) +x(-7 -(-6)) +(5 -2)

  h(x) = -2x^2 -x +3

Then h(1) is found by substituting 1 for x:

  h(1) = -2(1^2) -(1) +3 = -2 -1 +3

  h(1) = 0 . . . . difference in release amounts after 1 week is 0

The true statements are ...

  • h(x) = -2x^2 -x +3
  • Reservoir A releases the same amount of water as Reservoir B over 1 week
6 0
3 years ago
Is either x = 6 or x = 8 a solution to 12 + x = 20? O A. Neither is.a solution. B. X = 6 is a solution, but x = 8 is not. C. X=
Jobisdone [24]

Answer:

C. x = 8 is a solution, but x = 6 is not

Step-by-step explanation:

12 + 6 = 18

12 + 8 = 20

20 - 12 = 8

3 0
3 years ago
An office building loses a third of its heat between sundown and midnight and an additional half of the original amount of heat
Mekhanik [1.2K]

Answer:

\dfrac{1}{16}

Step-by-step explanation:

Proportion of Heat Loss Between sundown and midnight=\dfrac{1}{3}

Proportion of Heat Loss between midnight and 4 AM  =\dfrac{1}{2}

Proportion of Total Heat Already Lost =\dfrac{1}{3}+\dfrac{1}{2} =\dfrac{5}{6}

Proportion of Remaining Heat =1-\dfrac{5}{6}=\dfrac{1}{6}

Between 4 AM and 5 AM, five-eighths of the remaining heat is lost.

Proportion of Heat Loss between 4 AM and 5 AM= \dfrac{5}{8}$ X \dfrac{1}{6} = \dfrac{5}{48}

Therefore, Proportion of Remaining Heat Left =\dfrac{1}{6}- \dfrac{5}{48}=\dfrac{1}{16}

We therefore say that:

\dfrac{1}{16}$ of the total heat loss occurs between 5 AM and sunrise.

6 0
3 years ago
how much would $400 be worth after 16 years , if it were invested at 3% interest compounded annually ?
Andre45 [30]
Hello!

Judging on the question you have provided I have generated this equation to represent the situation 400(1.03^x) X being years.

To solve this equation you need to plug in 16 for X amount of years. 
The new equation should look something like this 400(1.03^16)

Lastly solve!
The answer you get should be $641.88

Hope this helped!
-Blake

7 0
3 years ago
Read 2 more answers
A used car already has 40,000 miles on its odometer. The average owner will drive 12,000 miles per year. What function best mode
alina1380 [7]
The answer i got was 28000
7 0
2 years ago
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