Minanisishioma I’m not sure
Answer:
Step-by-step explanation:
The arithmetic sequence has the form:
When a=10.31, n=9, we substitute to get:
Similarly, when n=13 and a=11.71, we get:
Subtract equation 1 from equation 2 to get:
This implies that
Substitute into the second equation to get:
Solve to get
Hence the explicit formula is:
Y= 2x + 3 because it’s wanting it to be the total cost.
Note:
1: tens
2: ones
.
1: tenths
5: hundredths
3: thousandths
7: ten-thousandths
You are solving for thousandths. Look at the number in the ten-thousandths place. It is a 7. Because 7 is greater than 5, you round up
12.1537 => 12.154
12.154 is your answer
hope this helps
-Radical two (square root of two)/2
Because:
5pi/4 = 225 the reference angle for that is 45 degrees, cos 45 = Radical two (square root of two)/2 and because 225 is in quadrant three and only tangent is positive in quadrant 3, the cos is negative