In the lab, maria has two solutions that contain alcohol and is mixing them with each other. she uses 3 times as much solution a as solution b. solution a is 17% alcohol and solution b is 20% alcohol. how many milliliters of solution b does she use, if the resulting mixture has 213 milliliters of pure alcohol?

the answer is 53.35 ml of solution B

Working - there are 4 parts in total (1 part solution B and 3 parts solution A)

therefore 213 divide 4 = 53.24 ml

Check - 53.25 x 1 = 53.25

and 53.25 x 3 = 159.75

Add 53.25 and 159.75 = 213

is it 35

step-by-step explanation:

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.