There are 40 pencils in a box. There are 15 pens in a packet. John gives one pencil and one pen to each person at a conference. He has no pencils or pens left. How many boxes of pencils and how many packets of pens did John buy?
Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120 Mulitples of 40: 40, 80, 120 This means that there are 120 people at the conference, and that he sold 3 boxes of pencils (40x3=120) and 8 boxes of pens (15x8=120)
AP
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How do I differentiate?
Tom tosses a coin. Every toss lands on either heads or tails. The coin lands on heads two thirds of the first 24 games. The coin then lands on heads the next 6 games. For all 30 tosses, work out the ratio heads:tails. Give the answer in the simplest form.
Expand and simplify: 3(4x+1)-5(3x-2)