Janet’s car insurance payment decreases by $20 each year. which expressions represent the total change in her payment, in dollars, after 5 years a. 20-20-20-20-20 b. 100 c. 5•(-20) d. -20•(-5) e. -100 pls answer my

Fred has a total of 62 dvd and cd. if the number of cd is three more than two times the number of dvd, how many cd does he have?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?