If angle a is complementary to angle b, and angle b is supplementary to angle c, what is the measurement of angle c if angle a is 21

Asix-sided number cube is rolled twice. what is the probability that the first roll is an even numbe and the second roll is a number greater than 4?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.