In sean's fish tank there are six times as many goldfish as guppies. there are a total of 21 fish in the tank. how many more goldfish are there then guppies?

Hannah is 3 years older than twice her brother joey’s age. joey is 2 years old. how old is hannah? show all of your work! the number of students is five more than seven times the number of teachers. there are 10 teachers. how many students are there? be sure to show all of your work!

What is the measure of sty in oo below? 130 310 230 50

Find the value of x in the diagram below. select the best answer from the choices provided