Find the percent of the number. 250% of 146 is?

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!

Solve the system of equations. y= 2x y= x^2 - 15

Which of the following expressions is equal to 2x^2+8