=(-17) - 4
=(-17) + (-4)
=(-21)
Correct me if im wrong but the answer is (B) hope this helps!
Bell is the tallest person at 52 inches, Con is the shortest person at 42 inches. So 54 - 42 = 12
$500 x 0.85 = 425
$425 x 0.85 = 361.25
$361.25 x 0.85 = 307.10
$307.1 x 0.85 = 261
$261 x 0.85 = 221.85
Evaluate this...

the x at the bottom cancels out one of the xs at the top so it will be

Now the one cancels out one of the 1s in the -4 so

Hope this helps :)