Answer:
see explanation
Step-by-step explanation:
the domain is the set of x- coordinates from the ordered pairs , that is
domain : { - 7, - 3, 0, 5 }
the range is the set of y- coordinates from the ordered pairs, that is
range : { - 2, 1, 2, 5 }
Answer:
Originally there were 30, 25 cents stamps and 20, 15 cent stamps.
Step-by-step explanation:
We are given the following in the question;
Let x be the number of 25 cents stamps and y be the number of 15 cents stamps.
Marci has a total 50 stamps.
Thus, we can write

Also,

Total cost = $16.50
Thus, we can write the equation:

Solving the two equations:

Originally,

Thus, originally there were 30, 25 cents stamps and 20, 15 cent stamps.
For all of these problems, make equation into slope-intercept form to be able to see what the slope is.
answer to 1.d. is neither