300 times 0.60(60%) = 180.
Answer: 180
Answer:
![y = 181.75xz^2](https://tex.z-dn.net/?f=y%20%3D%20181.75xz%5E2)
Step-by-step explanation:
Given
y jointly varies to x and z^2
Required
Find the equation
We start by writing out the variation;
![y\ \alpha\ xz^2](https://tex.z-dn.net/?f=y%5C%20%5Calpha%5C%20xz%5E2)
Write as equation
![y = kxz^2](https://tex.z-dn.net/?f=y%20%3D%20kxz%5E2)
Substitute values of x,y and z
![70 = k * 21 * 25^2](https://tex.z-dn.net/?f=70%20%3D%20k%20%2A%2021%20%2A%2025%5E2)
![70 = k * 21 * 25 * 25](https://tex.z-dn.net/?f=70%20%3D%20k%20%2A%2021%20%2A%2025%20%2A%2025)
![70 = k * 13125](https://tex.z-dn.net/?f=70%20%3D%20k%20%2A%2013125)
Divide both sides by 7
![\frac{70}{13125} = \frac{k * 131251}{13125}](https://tex.z-dn.net/?f=%5Cfrac%7B70%7D%7B13125%7D%20%3D%20%5Cfrac%7Bk%20%2A%20131251%7D%7B13125%7D)
![\frac{70}{13125} = k](https://tex.z-dn.net/?f=%5Cfrac%7B70%7D%7B13125%7D%20%3D%20k)
![187.5 = k](https://tex.z-dn.net/?f=187.5%20%3D%20k)
![k = 181.75](https://tex.z-dn.net/?f=k%20%3D%20181.75)
Substitute k in ![y = kxz^2](https://tex.z-dn.net/?f=y%20%3D%20kxz%5E2)
![y = 181.75xz^2](https://tex.z-dn.net/?f=y%20%3D%20181.75xz%5E2)
Answer:
7/8 inch
Step-by-step explanation:
Subtract 3/8 from 1 1/4:
5/4 - 3/8
becomes 10/8 - 3/8 = 7/8 (inch)
7tens= 70 3ones= 3
So 70+3=73
Ok so $2.05 + $15 = $17.05 so you want to try to spend the same amount of money in each store so what have to do is figure out the number of gallons you buy in each store i added 2 gallons for the first store so the amount would be $2.05(2) + $15= $21.15 so now to find the x in the next equation you have divide the sum by $2.35 which give you 9 gallons now you spent the same amount in each store so you paid for 11 gallons hope you give me brainliest answer lol