Answer:
b
Step-by-step explanation:
because you have to add them
# of sailboats : # of rowboats = 7:4
# of sailboats = 56
56 / 7 = 8
8 * 4 = # of rowboats
# of rowboats = 32
Answer:
A) 100°
B) 80°
C) 100°
Step-by-step explanation:
Angle A = 180 - 80 = 100°
Supplementary angles
Angle B = 80°
Corresponding angles
Angle C = 180 - 80 = 100°
Supplementary angles
A(n) = a(n-1)+9 means that we add 9 to the previous term to get the next term. Therefore the common difference is d = 9 this sequence is arithmetic.
The first term is a(1) = 21
Plug those two values into the arithmetic formula below and simplify
a(n) = a(1) + d * [ n - 1 ]
a(n) = 21 + 9 * [ n - 1 ]
a(n) = 21 + 9*n + 9*(-1)
a(n) = 21 + 9n - 9
a(n) = 9n+12
Answer is choice D
