Solve the following equation.
6cos²x - 7cosx + 1 = 0, for
0° ≤ x ≤ 360°

For 0° ≤ x ≤ 360° we have:

x=0, 360, arccos(1/6), -arccos(1/6)

Step-by-step explanation:

Replace cos(x) by y

6y²-7y+1=0

6y²-6y-y+1=0

6y(y-1) -(y-1)=0

(y-1)(6y-1)=0

Roots:

y=1, cos(x)=1, x=0 and 360

y=1/6, cos(x)=1/6, x=arccos(1/6) and x=-arccos(1/6)

Step-by-step explanation:

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.