Prove that 0. 818181818181... is a rational number.

(3, 7, 11, 15 ... )Find the nth term formula for the sequence.

4n - 2 is the formula for a sequence. Find the value of the 40th term.

Simplify 2x(x+3) + x(x-4)

2(y-4) + 4(y+2) = 30

What is the LCM of 72 and 120

25^1.5

Find the area of the object.

(3x +5)(4x - 7)

What are the sum of the interior angles of a decagon?

What are the values of x and y. Give reasons.

Simone and Jon are playing darts. The probability that Simone hits a bull’s-eye is 0.1. The probability that Jon throws a bull’seye is 0.2. Simone and Jon throw one dart each. Find the probability that exactly one bull's-eye is thrown?

(3y^2)^-3