He put 12 stamps in his collection.
Answer:
108$
Step-by-step explanation:
You could write this by going 63+42 or add 63 and 42
hope that's what you are looking for ;-)<span />
Answer:
terms- + -
variables- x p
coefficent-7 3
constant- 9
Step-by-step explanation:
Differentiating both sides of

with respect to <em>x</em> yields (using the chain rule)

Solve for d<em>y</em>/d<em>x</em> :

The answer is then D.