X = length of third side
The third side is unknown and can't be determined to be one fixed number. However, we can find a set of values or a range of acceptable values
If we know that
a = 6
b = 7
are the two given sides, then we can say
b-a < x < b+a
7-6 < x < 7+6
1 < x < 13
So the third side x can be between 1 and 13.
The third side cannot be equal to 1 unit or 13 units because a triangle would not form. Instead a straight line would form.
Note: This idea is using the triangle inequality theorem
1. 4/7
2.1/2
3.4/15
4.50/3
5. 6
6. 9
When you multiply the fraction just multiply denominator with denominator and numerator with numerator
Answer:

Step-by-step explanation:

The shifted down three units therefore c=-3
<span>To find: Cost of backcover.
Solution:
Let the cost of backcover be x.
Then,
56 = 2x - 24
56+24 = 2x
80 = 2x
80 / 2 = x
x = 40
The cost of backpack is $40.</span>