Answer:
Step-by-step explanation:
So we have the equation:
First, distribute the 7 into the (x+8) and simplify:
Combine the like terms 7x and 8x by adding them together:
Subtract 56 from both sides to isolate the x:
Divide both sides by 15 to get x:
Answer:
1 is 5+2a =7 and 2is 14+3a=3 and 3 is 7-2a=5
Answer:12 hrs
Step-by-step explanation: $15 per hour -> $180/$15 = 12 hours
Aprox 12. On Average, you can read 20 pages in 30 minutes and divide 20 by 30 you get 0.6 and 0.6 x 20 is 12.
In constructing the equation, you need to know the following:
1. What don't we know? How many minutes you must talk to have the same cost for both calling plans. So, let x be the number of minutes.
2. What do we know? Plan 1 charges $17.50 per month plus $0.17 per minute used and Plan 2 charges $32 per month plus $0.07 per minute used.
So the equation must look like this: 17.50 + .17x = 32 + 0.07x
Solving the equation:
1. Multiply both sides by 100
(100) 17.5 + .17x = 32 + 0.07x (100)
1750 + 17x = 3200 + 7x
2. Subtract 1750 from both sides
1750 + 17x - 1750 = 3200 + 7x - 1750
17x = 7x +1450
3. Subtract 7x from both sudes
17x - 7x = 7x + 1450 - 7x
10x = 1450
4. Divide both sides by 100
10x / 10 = 1450/10
x= 145 minutes
145 minutes is the number of minutes you must talk to have the same cost for both calling plans.
