Cos(-x)=-cos x for all values of x

a) True
b) False

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)