Solution: We have to choose two positions president and vice president from eight people. So, we need to use the Permutations formula in order to find the possible number of combinations.
The number of possible combinations is:
8P2 
Therefore the possible number of combination to select two positions from 8 people is 56
Answer: -7/9
Step-by-step explanation:
<u>10-3</u>
1-10
Answer:
A. x = -2, 5/2
B. Minimum
Vertex: (1/4, -81/8)
C. Draw a concave up graph connecting the x-intercepts, vertex and the y-intercept
Step-by-step explanation:
f(x) = 2x² - x - 10
2x² - x - 10 = 0
2x² - 5x + 4x - 10 = 0
x(2x - 5) + 2(2x - 5) = 0
(x + 2)(2x - 5) = 0
x = -2, 5/2
Vertex: (h,k)
h = midpoint of the x-intercepts (due to symmetry)
h = (-2 + 5/2) = 1/4
k = f(1/4)
k = 2(1/4)² - 1/4 - 10 = -81/8
Vertex: (1/4, -81/8)
y-intercept: when x = 0
2(0)² - 0 - 10 = -10
Draw a concave up quadratic connecting thr following points:
(-2,0)
(0,-10)
(1/4,-81/4)
(5/2,0)
