Burgers cost $4 each and fries cost $2 each. Write an equation that represents the total cost, 'T', of 'B', burgers
and 'F', fries.

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?