Can someone pls help this is 6th grade math i will give brainliest

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)