Answer:
D
Step-by-step explanation:
eh too lazy to explain but plz trust me
M = (y2 - y1)/(x2-x1)
= 2+5/-3-1
= 7/-4
= -7/4
Since x is the number of seconds it took the rock to hit the water, x is the value that we are looking for. When the rock hits the water, it's height is 0, therefore, f(x) = 0. So, we can set the expression on the right equal to 0, and solve for 0. Let's do just that:
We can divide by -16, nothing will happen because 0 divided by anything is 0:
To factor any trinomial in standard form (given below), we must find two numbers that add to "b" and multiply to "c":
So, for this specific question, let's find two numbers that add to -8 and multiply to 9. These are clearly 9 and -1. We can write it in this way now:
Both answers would be valid, but there can't be negative time, so your answer is
"It takes 9 seconds for the rock to reach the water."
The answer is either 14.5 * 8 or 14.5 * 10 , because a decagon can have 8 triangles of unequal size or 10 triangles of equal size.