Answer:
(a) an = 18 +3(n -1)
(b) row 35
Step-by-step explanation:
(a) The general term (an) of an arithmetic sequence can be expressed in terms of the first term (a1) and the common difference (d) as ...
an = a1 +d(n -1)
The given sequence has a1 = 18 and d = 3, so the explicit formula is ...
an = 18 + 3(n -1)
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(b) We want to find n such that an = 120.
120 = 18 + 3(n -1)
40 = 6 + n - 1 . . . . . . . divide by 3
35 = n . . . . . . . . . . . . . subtract 5
Row 35 has 120 seats.
Each of the angles in a triangle are 60 degrees, so when you add them together, you get 180
60+60+60=180
Answer:
Step-by-step explanation:
Given:
Consider the expression . First, add the like term and
Now, this expression is
Divide by Multiply by and subtract the result from the to eliminate the highest term
Multiply by -21 and subtract the result from
Hence,
The original price for each card is 80 dollars each.