<h2><u>Correct question</u> : 4x - 3 = 2x + 7 </h2>
<h2><u>Solution</u> : 4x - 3 = 2x + 7 </h2>

<h2>•••••••••••••••••••••••••••••••••••••••</h2>
<h2><u>Correct Question</u> : 2x + 6 = 7x - 14</h2>
<h2><u>Solution</u> : 2x + 6 = 7x - 14</h2>

I'd say option D because you can just tell right off the bat that if x = 0, then f(x) = 43.75.
Answer
Find out how many months will it take for Jeff to weigh the same as Darius .
To prove
As given
Jeff and Darius are trying to gain weight for the football team.
Jeff weighs 120 pounds and is gaining ten pounds per month.
Darius weighs 150 pounds and is gaining 4 pounds per month.
m = represented the number of months will taken by the Jeff to weigh the same as Darius .
Than the equation become in the form
120 + 10m = 150 +4m
150 - 120 = 10m - 4m
30 = 6m

m = 5 months
Therefore in 5 months will it take for Jeff to weigh the same as Darius.
In this question, the speed of the dolphin is already given, but the unit is different. The speed of the dolphin is given as 40 miles per hour and it has to be converted to feet per hour.
We already know that 1 mile = 5280 feet
Then
40 mile = 5280 * 40 feet
= 211200 feet
So the speed in feet per hour will be 211200 feet per hour. I hope the procedure is clear enough for you to understand. You can always use this method for solving similar problems without requiring any help from outside.