Step-by-step explanation:
the sequence is arithmetic due to the common difference that is equal
d=11-15=7-11=-4
a(n) = a1 +(n-1)d
a1=15
Then :
a(n) = 15+(n-1)-4
hope this helps
Answer:
15/32 or 0.46875
Step-by-step explanation:
A = LW
LW = A
(x + 3)(x - 8) = 42
x^2 - 8x + 3x - 24 = 42
x^2 - 5x - 66 = 0
(x - 11)(x + 6) = 0
x - 11 = 0 or x + 6 = 0
x = 11 or x = -6
The length of the side of a rectangle cannot be a negative number, so we discard the negative answer, x = -6.
Answer: x = 11