Answer:
+2
Step-by-step explanation:
=> 
=> 
<em>Arranging it in descending order</em>
=> 
<u><em>So, the coefficient of x² in this expression is +2</em></u>
The measure of first angle is 34 degrees and measure of second angle is 56 degrees
<em><u>Solution:</u></em>
Given that, the exterior sides of two adjacent angles make a right angle
Therefore, these adjacent angles forms 90 degrees
Let the second angle be "x"
The first angle has a measure that is six more than half the second
Therefore,
first angle = 6 + half of "x"

Since these two angles forms 90 degrees,
first angle + second angle = 90

<em><u>Therefore, first angle is:</u></em>

Thus measure of first angle is 34 degrees and measure of second angle is 56 degrees
Answer:
0.3114
Option d is right
Step-by-step explanation:
Let X be the time spent on a treadmill in the health club
Given that research shows that on average, patrons spend an average of 42.5 minutes on the treadmill, with a standard deviation of 5.4 minutes
Also given that X is normal
the probability that randomly selected individual would spent between 30 and 40 minutes on the treadmill.

round off to two decimals tog et
the probability that randomly selected individual would spent between 30 and 40 minutes on the treadmill is 0.31
Hence option d is right
Δ = 1 + 4*20 = 81
x' = (-1 + 9)/2 = 4
x'' = (-1 - 9)/2 = -5
4² + 4 - 20 = 0
(-5)² - 5 - 20 = 0
Ok !
R=21. 21/3=7. To check your answer, you can do 7x3 and it'll equal 21.