Many numbers, when multiplied by
![7](https://tex.z-dn.net/?f=7)
, are less than
![49](https://tex.z-dn.net/?f=49)
. We can find an inequality for numbers
![x](https://tex.z-dn.net/?f=x)
that are sufficient.
Clearly,
![7x < 49](https://tex.z-dn.net/?f=7x%20%3C%2049)
is the desired inequality. We divide by 7 to find that
![x < 7](https://tex.z-dn.net/?f=x%20%3C%207)
determines working numbers.
Answer:
48.5
Step-by-step explanation:
Answer:
x = -1
y = 2
Step-by-step explanation:
x + y = 1
y = -x + 1
y = -x + 1 (Multiply this by -1)
y = 3x +5
-y = x - 1
y = 3x +5
0 = 4x + 4
4x = -4
x = -1
x + y = 1
-1 + y = 1
y = 2
To solve this problem you must apply the proccedure shown below:
1. She has a total of 50 DVDs of 90 minutes each one of them. The cost of each DVD was 11€.
2. Therefore, to calculate the total cost of the collection, you must multiply the cost of each DVD by the total number of them:
€
3. To calculate the total minutes of the collection, you must multiply 90 minutes by the total number of DVDs:
![(90min)(50)=4500min](https://tex.z-dn.net/?f=%2890min%29%2850%29%3D4500min)
Therefore, the answer is: 550€ and 4500 minutes.
I think it's 60 I'm NOT sure. I just multiplied those three numbers