Prove algebraically that (image). Trigonometric Identities. Please help.

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

What is the slope of the line (-7,2) (4,6)

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b