Question

a human - boat with a top speed of 72 knots won the tournament cup in 2010. its speed is 7 knots more than 3.5 times the top speed of the winner monohull in the 2007 tournament. find the top speed of the monohull in the 2007 tournament.

the top speed of the monohull in the 2007 tournament was (square) knots.
(use an integer or a decimal.)

Explanation:

Step1: Set up the equation

Let the top - speed of the monohull be $x$ knots. The speed of the trimaran is 7 knots more than 3.5 times the top - speed of the monohull, and the trimaran's speed is 52 knots. So the equation is $3.5x + 7=52$.

Step2: Solve for $x$

First, subtract 7 from both sides of the equation: $3.5x=52 - 7$. So $3.5x = 45$.

Step3: Isolate $x$

Divide both sides of the equation by 3.5: $x=\frac{45}{3.5}=\frac{450}{35}=\frac{90}{7}\approx12.86$.

Answer:

$12.86$