Solve the system of equations by substitution. y=4x-13 2x+3y=17

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

What is always true when two whole numbers are subtracted?

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice