Photocopying. Quick Copy recently charged 49¢ per page for color copies and 7¢ per page for black-and-white copies. If Shirlee’s bill for 90 copies was $11.34, how many copies of each type were made?
Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Let C be number of color copies and B be the number of black and white copies. Total copies is 90, so B+C=90. 0.49C + 0.07B = 11.34 to tally the costs. Solve for B and C
c = colored copies
b = black and white copies
c + b = 90 -->c = 90 - b
.49c + .07b = 11.34
now just sub 90 - b in for c in the 2nd equation
.49(90 - b) + .07b = 11.34
can you take it from here and solve for b ? And once b is found, sub that back into the 1st equation and solve for c.
I would multiply second equation by 100 to eliminate decimals, and solve first equation to give one variable in terms of the other, then substitute that in second equation.