Descartes' rule of signs tells you the one sign change in the coefficients means there's one positive real root. If you change the sign of the odd-power terms, the signs become -++-, so have two sign changes. This means there are 0 or 2 negative real roots.
A graph shows there to be 3 real roots, two of which are negative. Thus there are no complex roots.
Answer:
Step-by-step explanation:
After some number of minutes m, Mohammed's altitude will be ...
40 +10m
and Dana's altitude will be ...
165 -15m
The altitudes will be the same when ...
40 +10m = 165 -15m
25m = 125 . . . . . . . . . . . add 15m-40
m = 5 . . . . . . . . . . . . . . . divide by 25
The height of the two balloons after 5 minutes will be 40+10·5 = 90 ft.
The median
The upper quartile range
The lower quartile range
Answer:
r= -4
Step-by-step explanation:
subtract 4 from both sides of the equation:
4r=16
simplify:
r= -4
Answer:
0.08x
Step-by-step explanation:
0.08 is read as 8 hundredths. This can also be written as 8/100. Percent means out of 100; this means 8/100 is 8%. This means 0.08x is taking 8% of the original amount; this would represent the sales tax that is paid.
