Answer:
-7 / (x^2 +3x-10)
Step-by-step explanation:
1/ (x+5) - 1/(x-2)
we need to get a common denominator
1/ (x+5) * (x-2)/ (x-2) - 1/(x-2) * (x+5)/(x+5)
(x-2) / (x+5)(x-2) - (x+5)/ (x+5)(x-2)
Combine the numerator
(x-2 -x-5)/ (x+5)(x-2)
-7/(x+5)(x-2)
FOIL the denominator
-7 /( x^2 -2x +5x -10)
Combine terms in the denominator
-7 / (x^2 +3x-10)
Answer:
The answer is 20pi
Step-by-step explanation:
perimeter of a semicircle = pi* radius
perimeter of first semicircle = 5.pi
perimeter of second semicircle = 5.pi
perimeter of third semicircle = 10. pi
total perimeter = 5pi +5pi + 10pi
= 20pi
Answer:
D
Step-by-step explanation:
A = (pi)(r)^2
A = (3.14)(3.7)^2
A= ~43
Okay so in the little chart at the bottom of the page, the first 2 are true, and the last one is false.
I hope this helps. If it does, please rate as Brainliest
Answer:
with a .95 probability, the sample mean will provide a margin of error 0.196
Step-by-step explanation:
margin of error (ME) from the mean can be calculated using the formula
ME= where
- z is the corresponding statistic in the .95 confidence level (1.96)
- s is the population standard deviation (1 min.)
- N is the sample size (100)
ME==0.196
95% confidence interval for check-out time would be 3 ±0.196 min