Solve, and find value of each letter

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Which number line correctly shows 0.8 + 0.3?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?