There are 4 boys for every 10 students in Ms. Day´s math class. If there are 30 girls in her class, how many boys are there? ( with explanation )

If 20% of a number is 35, what is 50% of that number?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2