The science club is selling puzzles to raise money. The supplier chargers a one time fee of $55 for each order and $10 for each puzzle. Write and solve an equation to find the number of puzzles the science club can buy if they have $1,245.

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.