What are the coordinates of the orthocenter of △DEF with vertices at D (-1, 2), E (-1, - 4), and F (2, - 4) ?

Find the area of a parallelogram with sides of 6 and 12 and an angle of 60°. A: 72√3 sq. units B: 36√3 sq. units C: 12√3 sq. units

By what number should I multiply 1 1/4 by to obtain 3/4 (fractions)

Suppose the number of prisoners held in a certain type of prison, measured in thousands, can be described by the polynomial - 2.02x + 78.47x + 744.

Simplify the expression. 9r 3r2 - 5r 7

Show your work Brianna spent her summer earning babysitting money. She gets paid $6 per hour and babysat for 125 hours. How much money did she earn?

What is the gcd of 7,28

F (x) = x^2+4 solve using the quadratic formula

Round 28.33 the the nearest hundredth

Built in 1599, the Globe Theatre was home to William Shakespeare and his performing company, The Lord Chamberlain's Men. It was a circular amphitheater that stood 3-stories tall and had a diameter of 100 feet.

If 3 is added to a number and the sum is tripled , the result is 21 more than the number. find the number.