Answer:
Option C is correct i.e. 2.
Step-by-step explanation:
Given the function is f(x) = x² +8x -2.
We can compare it with general quadratic expression i.e. ax² +bx +c.
Then a = 1, b = 8, c = -2.
We can find the number of real root by finding discriminant of the equation ax² +bx +c =0 as follows:-
D = b² -4ac
D = 8² -4*1*-2
D = 64 +8
D = 72.
When D is a positive value, then we have two real roots of the equation.
Hence, option C is correct i.e. 2.
Answer:
The maximum height is 1087.06 ft.
Step-by-step explanation:
We need to take the derivative of the equation and set it to 0.
We now can plug x = 7.9375 into the original equation.
Answer:
None. Wanda's work is correct.
Step-by-step explanation:
The first is correct.
The -3 in f(-3) is the X coordinate, so you need to find where the line is on the Y coordinate at that point.
The line is at Y = -9
There are 120 blocks left.
