Which equation would demonstrate the inverse property? A. (3x4) + (3x5) = 3(4+5)
B. 3x5 = 5x3
C. 3x4x5= (3x4)x5
D. 3/4 x 4/3= 1

(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

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

I’m still confused on how to work the percentages