What is (2tan(10 degrees))/(1 - tan^2 (10 degrees)) expressed as a single trigonometric ratio? I need help ASAP please

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

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

At 6 1/2 cents per pound of string beans how much does 7 pounds cost