A1 = 35x+25
Good guys = 40x
35x+25 = 40x
subtract 3x x from each side
25 = 5x
divide each side by 5
x = 25/5 = 5
so 5 hours they would be the same cost, anything over 5 hours and A1 would be better
so X>5 for A1 to be the better price
Do the opposite of division which is multiplication. 2.6x2=5.2
I hope I did it correctly and that it benefits you ^^
Answer:
Step-by-step explanation:
2x+2≤x+4≤3x+4
means : 2x+2≤x+4 ...(1) and x+4≤3x+4
(1) : 2x-x≤4-2 so : x≤2....(*)
(2) :3x+4 ≥x+4 .... 3x-x ≥ 0 so: x≥0 ....(**)
by (*) and (**) : 0≤x≤2 so : A=0 and B = 2
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
