(a+√b) (a-√b) = please

helps ​

Need to increase the numbers of customers i talk to daily by 20% how many customers do i need to talk to if i talk to a average of 8 customers per hour during an 8 hour shift

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

The coordinate grid shows a pentagon. the pentagon is translated 3 units to the right and 5 units up to create a new pentagon. what is the rule for the location of the new pentagon?