Answer:
a. ∠AMB, ∠BMC
b. ∠BMC, ∠CMD
Step-by-step explanation:
supplementary=angles add up to 180°
Complementary=angles add up to 90°
Answer:
x = 10.73
Step-by-step explanation:


Number of sets = (52 x 51 x 50 x 49) / (1 x 2 x 3 x 4) = 270725
Answer: There are 270725 possible 4-cards set.
If you would like to know how many hours will Lena need to work before she can afford to buy the computer, you can calculate this using the following steps:
$900 - $473 = $427
$427 / $7 = 61 hours of yard work
Result: Lena will need to work 61 hours before she can afford to buy the computer.