Answer:
The lemonade costs 1.4.
Step-by-step explanation:
This question is solved using a system of equations.
I am going to say that:
x is the cost of a cookie.
y is the cost of a lemonade.
Total cost for cookie and lemonade is 1.80.
This means that 
.
As we want y, we have that 
Lemonade costs 1.00 more than the cookie?
This means that:
So
The lemonade costs 1.4.
In mathematics, a unit circle is a circle of unit radius—that is, a radius of 1. Frequently, especially in trigonometry, the unit circle is the circle of radius 1 centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane.
Answer:
32/2 or 16.5
Step-by-step explanation:
Move everybody to one side
minus 5x+2 both sides
x^2-5x-2=0
use quadratic formula where
if you have
ax^2+bx+c=0
x=
1x^2-5x-2=0
a=1
b=-5
c=-2
x=
x=
x=
aprox
x=5.372281323 or -0.3722813233
The last one since it contains only fractions
