The weight W that a horizontal bean can support varies inversely as the length L of the beam. Suppose an 8-m beam can support 1200 kg. How many kilograms can a 14-m beam support?   I would recommend setting this up as a proportion.   8-m / 1200kg = 14-m / x If you cross...

An office equipment store buys highlighter pens boxes at a wholesale price of \$23 each. It then marks up the price by 82%, and sells the highlighter pens boxes. What is the amount of the markup? What is the selling price?   If you markup the highlighter pens boxes from \$23 by 82%, you...

Basically you are looking at subtraction of mixed numbers in this problem.    This month the mixed number was 15 3/10cm, last month it was 13 9/10cm.   You would subtract 15 3/10 - 13 9/10 to solve.   It is challenging to do as mixed number, so it is easier...

Can you please ensure that you have the numbers for the first set correct?   The second set, you can solve by substitution:   x + 2y = -7 2x - 3y = 0   Solve for x in first equation: x = -2y -7   Plug in to second equation: 2 (-2y-7)...

First you need to find out what the consecutive integers are for the lowest sum 80.  The equation should be written below to represent three consecutive integers, whose sum = 80. X + (x+1) + (x+2) = 80 X + x + 1 + x + 2 = 80 3x + 3 = 80 3x...