We can bring the ratios to a similar form, because 2:5 is the same as 4:10 (we can mupltiply rations by the same number)
so one ratio is 4:10 and the other is 4:15 and the difference is is 75 beads
in this ratio, we can see each number corresponding to a "unit" of beads: that means that what changed is that Patricia now has 5 more such groups (15-10=5), and since she has 75 beads more each unit must be 75/5=15.
so afterwards (and before) Karen had 4 such units, that is 60, and Patricia before had 10 such units, that is 150.
Answer: 4
Step -by-step :
7+7+7=21
5+12+a=
17+a
21-17=4
The unit rate is 8 pounds per dog.
128 / 16 = 8
$630
The total perimeter is 42 and 42x15=630
If m<2 is 18 then m<1 is 72
