Answer:
i
Step-by-step explanation:
Step-by-step explanation:
Substitute the y in the 1st equation with the 2nd equation.
7x + 10(2x + 9) = 36
7x + 20x + 90 = 36
27x + 90 = 36
3x + 10 = 4
3x = -6
x = -2
So now we can find y.
y = 2x + 9 = 2(-2) + 9 = (-4) + 9 = 5.
So x = -2, y = 5.
Answer:
f(x)=cos(x)
The amplitude is equal to 1. The period is 2π.
Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.
That is negative since the elevator is decreasing. If the elevator was going up, it would be positive.
