Answer:
D
Step-by-step explanation:
you can model the amount that each phone plan will cost after n minutes with these linear equations
company X: 
company Y: 20 + 4n
if you subtract the functions you can get the function for the
30 + 5n - ( 20 + 4n )
Answer:
25 gallons of sulfuric acid
Step-by-step explanation:
Find how much sulfuric acid is in the tank by finding 50% of 50 (the total gallons of solution):
50(0.5)
= 25
So, there are 25 gallons of sulfuric acid.
100% - 26% = 74%
74% ..............$629
<span>100% ..............?
629 x 100/74 = 850
</span>
answer
regular price is $850
Answer:

Step-by-step explanation:
y=mx+c
where m is the gradient and c is the y-intercept of the line
Let's find the gradient of the line first.

Using the above formula,

Subst. the gradient into m:

Now, find the value of c by substituting a coordinate into the above equation.
when x=-1, y=3,

Therefore the equation of the line is

Answer:
C
Step-by-step explanation:
I did the math