The math test has 10 multiple choice questions, each with 4 answers. betty guesses correctly on the first 2 questions. what is the probability that she will guess correctly on the third question?

Anyone know? will mark brainliest if correct

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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