To determine an nth term of an arithmetic sequence, we use the expression an = a1 + (n-1)d where a1 is the first term in the sequence, n is the number of the term in the sequence and d is the common difference. For a geometric sequence, it is expressed an = a1r^(n-1). We calculate as follows:
1. a128 = 9 + (128-1)(-5)
a128 = -626
2. a97 = (-3)(-2)^(97-1)
a97 = -2.377x10^29
Answer:
he will pay $44.60
Step-by-step explanation:
first shirt is $29
second shirt is 40% off so it is $15.60
total for the two shirts is $44.60
They would be <span>nonequivalent. </span>
Answer: 108 degrees
Step-by-step explanation:
180 - 72 = 108
The stem and leaf plot will look like:
6 | 1 5 8 - 3 scores
7 | 1 7 7 9 - 4 scores
8 | 2 3 4 5 7 9 - 6 scores
9 | 0 1 4 7 9 - 1 score
To total up the number of students who scored less than 90, we have 3 under 60-69, 4 under 70-79, and 6 under 80-89, so this is 3 + 4 + 6. This is the third choice.
