Answer:
c. approximately 90.07%
Step-by-step explanation:
We need to calculate z-statistic of 30 inches of rain in the normal distribution with an average of 35.4 inches of rain each year, and a standard deviation of 4.2 inches.
z score can be calculated using the formula
z=
where
- M is the average rain in inches (35.4)
- s is the standard deviation (4.2)
using the numbers we get z=
≈ −1,286
Then percentage of years does Ithaca get more than 30 inches of rain is
P(z>-1.286) =1- P(z<-1.286)=1-0.0993 ≈0.9007 or 90.7%
Answer: x = 10 y=20
Step-by-step explanation:
You can answer this question by plugging in each equation:
2x=y, x+y=30. Let us plug y as 2x in the second equation x+y=30
x+2x= 30
3x= 30
x=10
After we found x we can then find y by plugging the 10 for x.
2(10) = y
y =20
or you could plug in the other equation
10+y=30
subtract 10 from 30 and we get 20
to double check we can plug in both numbers
2(10) = 20 which is correct
and 10 + 20 = 30 which is correct
We know, nickel = 5 cents
& 1 dime = 10 cents,
So, money from nickel would be:= 5x
money from dime would be:= 10y
Total, money = 1000 cents ($10)
& You need to shade the area below the line for positive values of x and y.
By collecting all the datas from above, option A is your answer.
Hope this helps!
1. T+3>M^2=15
-3 -3
T>M^2=12
divide 2 on both sides
T>M=6
T=9 and M=6
T= 9 because you found M and you use the amount you got rid of to solve M to get T <span />
Answer:
C
Step-by-step explanation:
reasonable is 0 through 50.
mathematically the x values go to infinity both ways.
