Book Maths Puzzle Algebra

Hi, I am trying to solve this Linear Equation System by using the substitution method:

-x+3y=-1
x-2y=6

Read Solution (Total 0)

Book Other Question

Suppose you have a lemonade stand, and when you charge $1 per cup of lemonade you sell 60 cups. But when you raise the price to $2 you only sell 30 cups. Write an equation for the number of cups as function of the price you charge. Denote "C" for number of cups, and "P" for the price you charge. Assume the function is linear.

2. Take a look at the table below and write out an equation for f(x)

x -2-2 0 1 2
f(x) -5-2 1 4 7

3. For each of the relationships below, explain whether you think it is best described by a linear function or non-linear function. Explain your reasoning thorougghly

a) How fast it takes you to get to work as a function of how fast you drive
b) Probility of getting into a car accident as a function of how fast you drive.
c) Your height as a fuction of age (from age 0 to 100)
Area of a trapezoid is 24
base 1 = 8
base 2 = same as height,
what is the height??