Amy mixes 12 liters of 16% acid solution with a 40% acid solution to make a 32% acid solution.

how many liters of 40% solution did she use?

36 liters

24 liters

16 liters

4.8 liters

sounds & other waves originate from any vibrating object

shell's the art director at her local community center. she paid $10 and for each child that attends she earns $4.

for each child she ears $4 that is the slope m = 4

she paid $10, that is the initial amount paid. so 10 is the y intercept b

m =4   and b = 10

y intercept is 10 so the point is (0,10)

we start graph from y intercept (0,10)

slope = 4 . we know slope = rise / run

slope = 4   or 4/1   are same

rise = 4   and run = 1

for rise we move 4 units up and for run we move 1 unit to the right

the graph is attached below

x axis is the number of child she attends

y axis is the amount   she earns

this would be 35. 35 + 5 = 40. you take the known constant and subtract by the answer of the equation and you get y.