Triangle DEF has vertices D(0,4), E(10,4), and F(5,9) Prove that the triangle is isosceles and a right triangle.

Anumber cube is rolled and a coin is tossed. the number cube and the coin are fair. what is the probability that the number rolled is less than 4 and the coin toss is tails?

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income