Answer:
6
Step-by-step explanation:
1+3=4 4-2=2 2+4=6
Step-by-step explanation:
The sum of an arithmetic series is found by multiplying the number of terms times the average of the first and last terms. Example: 3 + 7 + 11 + 15 + ··· + 99 has a1 = 3 and d = 4.
Gradient =2 because the slope is 2 units. Y-intercept = -2 because it crosses the y-line at -2.
Answer:
t=6
Step-by-step explanation: