Your friend gave you a gift card for your birthday. you use it to buy a dvd for $15$15. the gift card balance shown on the receipt after the purchase is $45$45. what was the original value of the gift card? a. $3 b. $30 c. $50 d. $60

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?