The school assembly had 30 students in attendance and 20% of them were first graders. how many first graders were at the assembly?

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

What is the sum of these mixed numbers 4 2/3+ 3 1/9