The first one is the answer because he starts with $300 (which would be the b in this case) and he gets $5 for EACH customer (so that would be 5x)
Answer:
x = 3.5
Step-by-step explanation:
3 - 3x - 3 + 2x = 4x + 3x
-x = 7x
2x = - 7
x = 7/2
x = 3.5
2 = 2(-3) + 8
2 = -6 + 8
2 = 2
true.
2 = 3 + 1
2 = 4
false.
this is not a solution because both equations have to be true.
Answer:
V= $8
Step-by-step explanation:
Letting V denote the value of an hour,
the annual value of the time savings from the change can be written as
= (5 days/week × 50 weeks/year × .25 hours/day) × V, or 62.5 V per year.
The present value of 62.5 V per year, forever, at a 5% discount rate, is
= 62.5 V / 0.05.
The implication of the change in house prices is that households were willing to pay $10,000 to gain 15 minutes per commuting day, i.e., that the present value of the time savings is $10,000.
Setting 62.5 V / 0.05 = $10,000 and solving gives V = $8
15. First Distribute
-6x-4 = 2X + 6
Add 6X on both sides
-4 = 8x+6
Subract 6 on both sides
8x=-10
Divide by 8 on both sides
X = -10/8 = -5/4
16. -13
17. Cross Multiplication
32 = 3X-3
Add 3 on both sides
35 = 3X
Divide by 3 on both sides
35/3 = X
18. Can't see the whole picture
19. Add 7 on both sides
6N = 42. Divide by 6
N = 7
20. 2x+6=-x+1. ---- I cross multiplied
2x+5=-x. ---- I subract 1 on both sides
-3x = 5. ----- Subract 2X
X=5/-3 ---- I divided it by -3
