(f+g)(x) just means f(x) + g(x)
Choice B
The model hight for the door will be 27 centimeters
Answer: 49
Step-by-step explanation:
If iTs half of each square its the same
9x^2 - 16x + 60
Find the discriminant, b^2 - 4ac, which is the same as the value of the radicand.
(-16)^2 - 4 * 9 * 60 = -1904
Since the discriminant is negative, there will be NO real solutions, and 2 complex solutions.
Part B.
4x^2 + 8x - 5 = 0
You can tell if a quadratic is factorable if you find the discriminant and it is a perfect square. The discriminant for this quadratic is 144 so it is factorable.
(2x + 5)(2x - 1) = 0
Set each factor equal to zero.
2x + 5 = 0 2x - 1 = 0
subt 5 from both sides add 1 to both sides
2x = -5 2x = 1
divide both sides by 2 divide both sides by 2
x = -5/2 <span> </span> x = 1/2
<span>5x+8=7x-4
x=6
5(6)+8=38
7(6)-4=38
38+38=76
360-76=284
284/2=142
142=angle ABC</span>
