Answer:
x = (1/2) (-9 ± √73)
Step-by-step explanation:
Using completing the square method
x²+9x+2=0
x²+9x = -2 (complete the square by adding (9/2)² to both sides)
x²+9x + (9/2)² = -2 + (9/2)²
( x + (9/2) )² = -2+ (9/2)²
( x + (9/2) )² = -2+ (81/4)
( x + (9/2) )² = 73/4
x + (9/2) = ± √(73/4)
x + (9/2) = ± √(73) / 2
x = -(9/2) ± √(73) / 2 (factorize out (1/2) )
x = (1/2) (-9 ± √73)
791.68 will be your answer.....
Answer:
each song would be 67 cents (0.67)
Step-by-step explanation:
9.38/14=0.67
Answer:
Science students
Step-by-step explanation:
MATHEMATICS :
Plot interval = 30 to 50
MEAN :
(34*2) + (40*2) + (32*1) + (33*1) + (35*1) + (37*1) + (39*1) = 324
Sample size, n = (2 + 2 + 1 + 1 + 1 + 1 + 1) = 9
Mean = 324 / 9 = 36
BOTTOM :
SCIENCE :
MEAN : (43*2)+(46*2)+(49*2)+(41*1)+(42*1)+(47*1) =
406
SAMPLE SIZE = (2 + 2 + 2 + 1 +1 +1) = 9
406 / 9 = 45.111
<span>a=9.3</span> units
Explanation:
Use pythagorean theorem,
<span><span>c2</span>=<span>b2</span>+<span>a2</span></span>
Rearrange,
<span>a=<span>√<span><span>c2</span>−<span>b2</span></span></span></span>
Sub in and solve,
<span>a=<span>√<span><span><span>(12.6)</span>2</span>−<span><span>(8.5)</span>2</span></span></span></span>
<span>a=9.30</span> units
hope i helped -beanz:)
