Answer:
Getting through ratio method
100-20=80 percent have to pay
18:80
<em>x</em>:100
cross multiply
80 x <em>x=1</em>8 x 100
80x=1800
x=1800/80
x=22.5
So the original price was $22.50
Step-by-step explanation:
Answer:
y=7
Step-by-step explanation:
-6y= -27-15
-6y= -42
y=7
Answer: x=ab-c
Step-by-step explanation:
a=
+c
ab=x+c
ab-c=x
x=ab-c
The type of limacon graphed is a convex.
Answer:
f(a + 2) = (5 + a) / (a - 1)
Step-by-step explanation:
To answer items such as this, we directly substitute the a + 2 to the all the x's in the function such that,
f(a + 2) = (3 + a + 2) / (a + 2 - 3)
Simplifying the function generated above,
f(a + 2) = (5 + a) / (a - 1)
