Answer:


Step-by-step explanation:
Let
x ---> the number
we know that
The algebraic expression is equal to multiply the number by 4, add 5 and equal 8
so

Solve for x
subtract 5 both sides

Divide by 4 both sides

(N instead of X for variable)
N x 7 < 21
Answer:
Step-by-step explanation:
Okay so lets put the x values on one side and the whole numbers which are the numbers without variables on the right side.
so now,
m/9 = -2/3 + 7/3
now lets use the inverse operation of division to multiply 9 to separate it from the variable
9(m = -2/3 + 7/3)9
m = -18/3 + 63/3
which can be simplified to,
m = -6 + 21
so,
m = 15.
Hope this helps!
This function has a couple of restrictions:
- y can't be less than zero, because when you have no money left you can't buy any more tickets
- x must be a positive integer, because you can't buy a negative of fractional amount of tickets.
With these constraints in mind, we can explicitly write all the possible (x,y) couples:

Where x is the number of tickets bought and y is the amount of money you're left with. So, if you buy no tickets, you still have all your $60. If you buy 1 ticket you're left with $52. If you buy 2 tickets, you're left with $44, and so on.
This table shows that the domain is the set

And the range is the set

And they are both discrete. To graph the function, simply draw all the (x,y) couples on a coordinate grid.
Answer:
y = 15
Step-by-step explanation:
Subtract 3 from 18
18 - 3 = 15