Answer:
abdul has 15
keiko has 22
bob has 45
Step-by-step explanation:
82= a+7+3a+a
75=a+3a+a
75=5a
15=a
15=abdul
15+7=keiko
3(15)=bob
He rode 3 miles on monday, 10 on tuesday
10+3=13
rode two times farther on wed
so 10x2=20
13+20=33
The answer is 2,115,000
I hope I help you
By the chain rule,


When

, we get

, so at this point the partial derivative of

with respect to

takes on a value of
95 + 25x + 25y
120x + 25y
25 + 95x + y
95x + 50y