Suppose you have 20 coins that total $3.00. Some coins are Nickels and some are quarters. Which of the following pairs of equations would you use to find out how many of each coin you have?

What is the value of x in the following equation. -x ^3/2 = -27

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?