Answer:
variable: number of hours
inequality (unsimplified): 4x+3 > 2x+10
inequality (simplified): x > 3.5
at least 4 hours
Step-by-step explanation:
we can use mx+b to solve this. m will be the rate at which the water level rises and b will be your stating point. x defines the hour; this is your varible as it can change
Tank A: 4x+3
Tank B: 2x+10
since we want to find when tank a will have be deeper than tank b, we set the inequality to solve for greater than tank a: 4x+3 > 2x+10
subtract 3 to both sides: 4x > 2x + 7
subtract 2x to both sides: 2x > 7
divide both sides by 2: x > 3.5
