How do you know 21/30 is greater than 5/8 answer it like a 4th grader : ) my sis needs : ) pls i will you ❤️

Describe the domain and range of y=2(3)^x-2+5

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

What is the value of x when x + 7 = 21?