Answer:

Step-by-step explanation:
Let
x ----> the length of Zach's car
y ----> the length of Ginny's car
we know that
The sum of the lengths of both cars is 30 inches
so
----> equation A
Ginny's car is 2 more than 3 times the length of Zach's car
so
----> equation B
substitute equation B in equation A

Answer:
A)
Step-by-step explanation:
Is there like a picture or something?
Answer:
All real number greater than equal to zero.
Step-by-step explanation:
The function is given by

The domain is defined as the input values so that the function is well defined.
here, the values of x should be all real number and zero also.
So, the correct option is (d).
Answer:
(Q) Find the amount in the account at the end of 1 year.
(A) $8,190
2.
(Q) Find the amount in the account at the end of 2 years.
(A) $16,380