Answer:
Last option
Step-by-step explanation:
Answer:
766
Step-by-step explanation:
Given, y varies directly as x
So,
![y=c\cdot x](https://tex.z-dn.net/?f=y%3Dc%5Ccdot%20x)
Where c is a constant
When y equals 5 when x is 8
So,
![\begin{gathered} 5=c\cdot8 \\ c=\frac{5}{8} \\ \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%205%3Dc%5Ccdot8%20%5C%5C%20c%3D%5Cfrac%7B5%7D%7B8%7D%20%5C%5C%20%20%5Cend%7Bgathered%7D)
So, the relation between y and x
![y=\frac{5}{8}x](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B5%7D%7B8%7Dx)
now , when x = 9
Substitute with x to find y
![y=\frac{5}{8}\cdot9=\frac{45}{8}](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B5%7D%7B8%7D%5Ccdot9%3D%5Cfrac%7B45%7D%7B8%7D)
So, the answer is option 2. y = 45/8
First you have to canceled out the fours from both side 4x/4-12/4 so x=3 then you do the same thing to the 7x-18
4x-12.
4x/4-12/4. So x=3
The fours cancelled out
7x-18
7x/7-18/7. So x= 2 4/7
The sevens cancelled out
Answer: Initial Temp: 71
Rate of change: -13/1
Step-by-step explanation:
For the intitial temperature, 32 and add 13 three times for each hour. For rate of change it is temperature dropped/ hour