Can someone please talk with me cuz im very own in the dumps and heartbroken and i just need to talk

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.