Answer: $300
Step-by-step explanation:
Mr. Calvin earned 
He spent
on food i.e.



Remaining money = 
So, he saved $300 after expenses
Answer: 
Step-by-step explanation:
Let u be a differentiable function , then
(1)
Given function : 
Differentiate both sides with respect to x , we get
(By using (1))
[∵
]
Hence, the derivative of the given function is
.
Answer:
x=6
Step-by-step explanation:
-21+3x=-3
+21 +21
3x=18
/3 /3
x = 6
Answer:
1/2 yard
Step-by-step explanation:
Multiply the top numbers (the numerators). Which would give you 6.
Multiply the bottom numbers (the denominators). Which would leave you with 12.
Simplify the fraction if needed. 6/12 can be simplified down to 1/2