Which of the expressions
is equivalent to b - (a)?
a) a + (-b)
b) -a + (-5)
c) b + (-a)

Could someone with number 1 and 2

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Rectangle bcde is similar to rectangle vwxy. what is the length of side vy? a) 1 7 b) 2 7 c) 3 7 d) 4 7