We are given with a number of marbles in different colors. The sample space includes all the marbles inside the bag, hence tehere are 16 marbles. The probability of getting a red or blue marble is the sum of probability of getting a red marble alone and that of a blue marble alone. Hence the answer is (6+4)/16 equal to 5/8
The common difference is x
the first term is x+1
a_8 = x+1 + x(8-1) = x+1 + 7x = 8x + 1
You just have to simplify:
-2n+6
Answer:
an = 67 -11(n -1)
Step-by-step explanation:
The terms of your arithmetic sequence have a common difference of -11. The first term is 67.
These values can be used in the generic formula for the n-th term:
an = a1 +d(n -1) . . . . . . first term a1, common difference d
an = 67 -11(n -1) . . . . . formula for the n-th term
The value of x would be 6.5 because if you add 1 to 6.5 you get 7.5 and 7.5 multiplied by 4 is 30
