What do you need help with?
Answer:
Step-by-step explanation:
CosB = ((15^2) + (8^2) - (14^2)) / (-2(15)(8))
cosB = 93 / -240
Take inverse cosine:
113°
Answer:
5m² - 6m + 1
Step-by-step explanation:
f(x) = 5x² + 4x - 5
substituting value,
f(m-1) = 5(m-1)² + 4(m-1) - 5
so,
5(m-1)² + 4(m-1) - 5
= 5(m²-2m+1) + 4m -1 - 5
= 5m² - 10m + 5 + 4m - 4
= 5m² - 6m + 1
Answer:
12
Step by Step Explanation:
f(n+1) = 2f(n) + 10
a = 2, k = 10
a + k = 2 + 10 = 12
If an is a5
and
an-1 is a4
then using your recursive formula for an arithmetic sequence
an=an-1 +d
then
a5=a4+d
now, a4 =6 and common difference "d" is d=-11
hence
a5=6 -11
6-11= -5
any questions?
