Solve the system.
x = y + 11
2x + y = -2

a. (-13,2)
b. (0,-11)
c. (3,-8)
d. no solution

(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

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function