Which expressions are equivalent to 10a - 25 + 5b
−2(−5a−25+5b)
(2a−5+b)5
10×(a−2.5+0.5b)
(−2a+5−b)⋅(−5)
−10⋅(−a−2.5−0.5b)

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

According to the number line, what is the distance between points a and b? v ++ + + + + -16 -14 -12 -10 -8 + 6 + 4 + -2 + 0 + 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 o6 units o 7 units 12 units o 14 units

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1