Answer:
42 / 7 = 6
Step-by-step explanation:
There are 6 rows in the class room.
Answer:
3/2(x+y)
Step-by-step explanation:
The cost of 2 DVD is x+y
Divide by 2 to get the cost of one DVD
(x+y) /2
Multiply by 3 to get the cost of 3
3/2(x+y)
He saves $ 1.75 each day from his allowance.
<u><em>Explanation</em></u>
The ratio of his savings and expenses is 7 : 5
Lets assume, his savings = 7x dollar and his expenses is 5x dollar
Given that, his daily allowance is $3. So....
![7x+5x=3\\ \\ 12x=3\\ \\ x=\frac{3}{12}= \frac{1}{4}= 0.25](https://tex.z-dn.net/?f=7x%2B5x%3D3%5C%5C%20%5C%5C%2012x%3D3%5C%5C%20%5C%5C%20x%3D%5Cfrac%7B3%7D%7B12%7D%3D%20%5Cfrac%7B1%7D%7B4%7D%3D%200.25)
So, the amount of his savings each day ![=7x= (7*0.25)dollar= 1.75 dollar](https://tex.z-dn.net/?f=%3D7x%3D%20%287%2A0.25%29dollar%3D%201.75%20dollar)