Is the trinomial a perfect square? write yes or no. x^2+12x+36

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

The following division is being performed using multiplication by the reciprocal find the missing numbers is 5/12 divided by x/3 equals 5/12 times x/10 equals 1/x