For this case, the first thing we must do is define variables.
We have then:
x: number of minutes
y: final temperature
We write then the equation that models the problem:
For y = 20 we have:
Clearing x:
Answer:
The temperature of the water will be 20 degree celcius after 150 minutes
Answer:
The correct answer is:
- <u>30 = 10 + 3(h - 2)</u>
<u>30 = 10 + 3h - 6</u>
<u>26 = 3h</u>
<u>h = 8.67</u>
Step-by-step explanation:
We're gonna calculate by our part the hours a new costumer can rent a bike and pay a total of $30, using the original function:
Where:
- <em>f (h) = Total cost.
</em>
- <em>h = the number of hours.</em>
We know The total money spent must be $30, by this reason, the function change to:
- <u>30 = 10 + 3(h - 2)</u>
Now, we must clear the h variable, by this reason, we multiply 3 by h and 2:
- 30 = 10 + 3*h - 3*2
- <u>30 = 10 + 3h - 6</u>
We pass the 10 and the -6 to the left side of the equality:
- 30 - 10 + 6 = 3h (Remember to change the signs when you do this step)
- <u>26 = 3h</u>
Finally, we pass the 3 to the left side of the equality:
26 / 3 = h (the 3 pass to divide because is multiplying the x)
If we just use two decimals, the number of hours is:
How the third option is the one that shows this calculation and result, that is the correct answer.
Answer:
The coefficient of variation (CV)= 9.83
Step-by-step explanation:
look at the attachment above ☝️
She was given 12 quarters. When she had 6x as many quarters in her bank, she had 24 quarters in it. When she had 9x as many, she had 36 quarters in it. 36-24 is 12.