First, you need to know how many gallons will be in the tank after 1 hour. So:
Answer:
--- the equation of SaveMore company
Step-by-step explanation:
Given
SaveMore
Required
Determine the equation
Let
So, we have:
The equation for the second company is not given. So, the (b) part cannot be correctly answered.
A general solution to the (b) part is:
Assume the equation is:
Next, we equate both
i.e.
This gives:
Collect like terms
Divide by 0.2
<em>Hence, the charges will be the same after 30 texts</em>
1 < = x + 7 < 7....subtract 7
1 - 7 < = x + 7 - 7 < 7 - 7...simplify
-6 < = x < 0
closed circle on -6, open circle on 0, shading in between
It will take 80 minutes to fill the pool 20x4=80