Heather was walking 3 miles per hour. what was her speed in yards per minute

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.