What is the definition of perpendicular lines?
A. lines that intersect at right angles
B. lines that intersect at straight angles
C. lines in the same plane that do not intersect
D. lines in different planes that do not intersect

Which of the following is true for the relation f(x)=2x^2+1

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

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10