Just do what you said (subsitute) and solve
x=number of classes
7.5x=5.5x+10
subtract 5.5x from both sides
2x=10
divide 2
x=5
5 classes
to find how much it costs, subsitute 5 for x in any equation
y=7.5(5)
y=37.5
total cost is $37.5 per month
ANSWER: 1.562
move the decimal point of 0.0034 to the right to make it a whole number which is 34. Then multiply 34 times 430 which is 15,620.
move the decimal point (which is at the end) 4 times to the left
the answer will be 1.562
Πr^2 - the base of a cone is a circle, so use the equation for area of a circle
X * 0,8 = 259,2 <=>
x = 258,2/0,8 <=>
x = 322,75
The total budget was 322,75$
False. All points on the graph of an equation satisfies the equation.