Question 132075
1.   The answer is b.  80% of $12,000 is $9,600.  If the car is worth less than $12,000, $9,600 will be greater than 80%. Answer d is exactly 80% which is not less.

2.  Let x and y be the complementary angles.  then 

x + y = 90

x + y/2 = 79

Solving the 2 equations and 2 unknowns yields

x = 90 - y
substituting for x in the 2nd equation yields
90 - y + y/2 = 79
90 - y/2 = 79
y/2 = 11
y = 22

then from x + y = 90,
x + 22 = 90
x = 68

the two angles are 68 and 22 degrees.