Kira solved the equation in the following way.

7
2
− 2x = 11
2

7
2
− 7
2
− 2x = 11
2
− 7
2

−2x ÷ −2 = 4
2
÷ − 2

x = −1

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

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

Aregular octagon rotates 360 degrees about its center. how many times does the image of the octagon coincide with the preimage during the rotation?