The mass of a cat in grams is greater because in 1 gram=0.001 kilograms
Math helps with science because you'll need to know the math in order to convert units in science.
Y = kx
72 = k*3
73/3 = k
24 = k
y = 24x
2(4x+5)>7x+20 perform indicated multiplication on left side
8x+10>7x+20 subtract 7x from both sides
x+10>20 subtract 10 from both sides
x>10
or in interval notation, x=(10, +oo)
