Answer:
f(x) = x² - 2x - 15
Step-by-step explanation:
∵ The function intersect x-axis at -3 and 5
∴ f(x) = 0 at x = -3 , 5
∵ The form of the quadratic equation is ⇒ ax² + -b/a x + c/a = 0
ax² - b/a x + c/a = 0
Where the sum of its roots is b/a and their multiplication is c/a
∵ a = 1
∵ -3 , 5 are the roots of the quadratic equation
∴ b = -3 + 5 = 2
∴ c = -3 × 5 = -15
∴ f(x) = x² - 2x - 15
Answer:
73.3%
Step-by-step explanation:
Answer:
It will travel 1 mile in 2 hours.
Step-by-step explanation:
First you will have to find the unit rate, which is how much miles does a boat travel in one hour. In order to do that you do,
1.5 / 3
So then you will get 0.5 miles in one hour.
Then you find out how long it takes to travel in 2 hours. You do that by doing
0.5 * 2
So you will get 1 mile
So your final answer is, the boat will travel 1 mile in two hours.
