At what x-values do the graphs of the functions y=cos2x and y=3cos^2x-sin^2x intersect over the interval -pi<_x<_pi? Select all that apply. (View the attachment for answer choices.)

dont know

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)

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