Split this figure into 3 triangles and 1 rectangle. Then calculate area of each shape.
1/2(2)(7) = 71/2(7)(3) = 10.51/2(3)(4) = 63 x 4 = 12
area of this polygon:7 + 10.5 + 6 + 12 = 35.5
answer35.5 units²
Let the nth term be given by the expression an²+bn+c.
We can write A: -7=a+b+c B: -6=4a+2b+c C: -3=9a+3b+c
D: B-A: 1=3a+b
E: C-B: 3=5a+b
E-Dm 2=2a, a=1, b=1-3=-2, c=-7-1+2=-6.
So the expression for the nth term is n²-2n-6.
Put n=4: 16-8-6=2 which fits the sequence.
Put n=5: 25-10-6=9 which also fits the sequence.
So the nth term is
Answer:
504
Step-by-step explanation:
31 + 33 + 35 + 37 + 39 + 41 + 43 + 45 + 47 + 49 + 51 + 53 = 504
^^these are all odd integers between 30 & 54