If you toss four coins, what is the probability that you will get exactly 1 or 4 heads? tell whether these events are overlapping or non-overlapping.

No Heads = 4C0 = 1
One Heads HTTT = 4C1 = 4
Two Heads TTHH = 4C2 = 6
Three Heads HHHT = 4C3 = 4
Four Heads = 4C4 = 1

 Total chances = 1 + 4+ 6+4 +1 = 16

One head + 4 head = 4 +1 = 5

Total probability = 5/16

answer: jasmine will bake 4/3 or 1 1/3 cookies in an hour

step-by-step explanation:

if u add 1/3 every 15 minutes after an hour u will have 4/3 or 1 1/3

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".