Just a question I have that I need to solve for fun.

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Which of the following is the graph of y= square root -x-3