In the following equations, the value of x represents the price per pound of gravel and the value of y represents the price per pound of sand. 2y = 3x + 8

5y – 15x = -30

At what price for sand do the two lines intersect? (Find the value of y.)

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Which of the following three dimensional figures has a circle as it’s base

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