Hey friend in order to figure that out, we need to solve all of these proportions. Lets start with A! What you first want to do is cross multiply so... 10 * 100 = 25 * 40 Simplify 1000 = 25 * 40 1000 = 1000 Add -1000 to both sides 1000 - 1000 = 1000 - 1000 0 = 0. (This proportion is true) Moving on to B Same steps! 18 * 50 = 48 * 20 900 = 48 * 20 900 = 960 (This is false therefore B is our answer however we want to check the others as well) C is... 25 * 135 = 45 * 75 3375 = 45 * 75 3375 = 3375 3375 - 3375 = 3375 - 3375 0 = 0 (True) D is.... 24 * 25 = 30 * 20 600 = 30 * 20 600 = 600 600 - 600 = 600 - 600 0 = 0 (True)
Well each ladder has 30, and then it depends on how each person climbs their ladder. One climb at the rate of -2 per second. The other climb at the rate of 1 per second. Just x is equal to 1, that's why I didnt put 1x. Equation: 30 + -2x = 30 + x
