Trying to nake honor roll

a local hamburger shop sold a combined total of 478 hamburgers and cheeseburgers on sunday. there were 72 fewer cheeseburgers sold than hamburgers. how many hamburgers were sold on sunday?

275 hamburgers.

Step-by-step explanation:

Let hamburgers = x

Let cheeseburgers = y

A combined total of 478 were sold on sunday, with 72 cheeseburgers less than hamburgers. Set the equations:

x + y = 478

y = x - 72

Plug in x - 72 for y:

x + (x - 72) = 478

Combine like terms:

2x - 72 = 478

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. First, add 72 to both sides:

2x - 72 (+72) = 478 (+72)

2x = 478 + 72

2x = 550

Isolate the variable, x. Divide 2 from both sides:

(2x)/2 = (550)/2

x = 550/2

x = 275.

275 hamburgers were sold on sunday.

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)