A helium balloon on a string is tethered to a fence outside of a house. The altitude of the balloc be represented by the rational number feet. The string breaks and the balloon ascends 20 feet minute for 5 minutes. The helium then begins to leak out of the balloon, causing it to descend a per minute for 4 minutes. What is the elevation of the balloon after it descends for 4 minutes?​

What expression is equivalent to 42x-56y

Use the spider tool located on page 1 of this activity to draw a 12-pointed star for the new logo. (hint: if the spider rotates 360 degrees -- or 720 degrees or 1080 degrees -- she will be facing in the same direction in which she started. when the spider is done drawing, you want her to be facing in the same direction in which she started. she'll be making 12 rotations, all the same size, so each rotation must be some multiple of 360/12 = 30 degrees.) urgently. been stuck on this problem for around 45 minutes now.! it should be easy if you're smart enough

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅