Answer:
x = 3, -1/2
Step-by-step explanation:
Use the quadratic formula: x = [-b ± √b² - 4ac]/2a
The square root sign should be over the entire expression b² - 4ac
In this problem, a = -6, b = 15, and c = 9
So, putting in those values, we get x = -15 ± √225+216, all divided by -12
Simplifying further, we get -15 ± 21 all divided by -12, or -36/-12 = 3 OR
6/-12 = -1/2
26
125+29=154
180-154=26
C. 2.50, 2.51, 5.00, 5.01, 7.50, 9.00, 10.00
Solution:
Given:
when x = 4,
The answer is 9.
<u>x = 9</u>
mean = 5+7+7+x /4 = 7
19+x / 4 = 7
19+x = 28
x = 9
