Answer: 42 square feet.
Step-by-step explanation:
1/2 times 12 times 7 is 42.
A is an Arithmetic Sequence. The numbers in A are decreasing by a value of 7 every position, fulfilling the requirements to be an arithmetic sequence. None of the other answers fulfill those requirements.
Step-by-step explanation:
square of 8 is 64 and square of the 6 is 36
8^2= 8*8=64
6^2= 6*6=36
A1 is when i = 3. i.e. 2(3) + 3 = 6 + 3 = 9
an is when i = 10. i.e. 2(10) + 3 = 20 + 3 = 23
n = count from 3 to 10 = 8
Therefore, sum = 8/2(9 + 23) = 4(32) = 128
Answer:
yes!!
Step-by-step explanation:
good luck