Answer:
Step-by-step explanation:
Factor it by first setting it equal to 0:
Now subtract 9 from both sides:
Divide both sides by 4:
Then take the square root of both sides:
x = ±
, which of course is not allowed. Therefore, we have to allow for the imaginary numbers in this solution. Knowing that,
x = ±
is an equivalent radicand, we can now replace -1 with its imaginary counterpart:
x = ±
Each one of the elements in the radicand are perfect squares, so we simplify as follows:
x = ±
And there you go!
It'll be an acute angle, because a right angle would've been 90° but it's 89°. An obtuse angle would've been over 90°.
Answer:
1. The vertex of the function is at (1,-25)
5. The graph is a negative on the Entire interval -4<x<6
120 - 30.5 = 89.5
89.5 / 12.5 = 7.16
the maximum of chairs he can paint is A, 7 chairs
