In Juneau, Alaska, the 30-year annual snowfall average is 86.7 inches with a standard deviation of 40.4 inches. The last four years saw an average annual snowfall of 115.7 inches, 62.9 inches, 168.5 inches, and 135.7 inches. Hia performs a hypothesis test on this data to determine if the next 30-year norm will have a different average if the trend from the last four years continues. She uses a significance level of 5%. Which of the following is a conclusion that she may make?a) The z-statistic is 1.44, so the null hypothesis cannot be rejected.
b) he z-statistic is 1.68, so the null hypothesis cannot be rejected.
c) The z-statistic is 1.85, so the null hypothesis should be rejected.
d) The z-statistic is 4.6, so the null hypothesis should be rejected.
Answers
Answer:
its B
Step-by-step explanation:
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Let x represent any number in the set if even integers greater than 1
2-90 Frieda Friendly works for a local car dealership. She noticed that 343434of the cars are sedans and that half of them are white. What fraction of the dealership’s cars are white sedans?A. Use a unit rectangle to represent this situation. Label the parts carefully. (Complete in your notebook.)B. Write an equation or a sentence that describes the situation, and answer the question. (Complete in your notebook.)Write your answer from part (b) as a decimal and as a percent.PLEASE ISTG IM CRYING OVER THIS QUESTION- I'LL MARK BRAINLIEST!!!!!!
Hailey simplified the expression (12xy74x4y3)2 using the following steps:Step 1: (3x−3y4)2Step 2: 3x−6y8Step 3:3y8x6Did Hailey correctly simplify the expression?A Yes, Hailey correctly simplified the expression.B No, in Step 1, Hailey should have added the exponents instead of subtracting them.C No, in Step 2, Hailey should have squared each exponent value instead of multiplying each value by 2.D No, in Step 2, Hailey should have also multiplied the exponent of the coefficient by 2 to get 32.
Answers
Answer:
7.5$
Step-by-step explanation:
Answers
A quadrant is the group, or side of the graph.
There are 4 quadrants on a normal graph.
Below (in picture) is each one.
4x + 7y= 1
3x +10y=15
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4× (3x+10y=15) 12x+40y=60 ⇒ (x s cancel out)
-21y=-3
40y=60 ⇒19y-57
y=3
for find the x plug in the 3 to the y one of these two equations and solve for the x
12x+40(3)=60
12x=-60
x=5 HOPE IT HELPS:)
Let's cancel out the x term first
Multiply the first equation by -3 and the second equation by 4
-3(4x+7y)=-3(1) => -12x-21y=-3
4(3x+10y)=4(15) => 12x+40y=60
Add the two equations and the x terms cancel out, leaving 19y=57
y=57/9=3
Substitute that into the second equation and you get
3x+10(3)=15
3x+30=15
3x=-15
X=-15/3=-5
Final answer:
x=-5
y=3
Answers
Answer:
A. 5040
Step-by-step explanation:
Number of players of the basketball = 7 and these players are to be listed in order in a program.
Since in any question if order is important then permutation is used and if order does not matters combination is applied.
Therefore for this question where 7 basketball players are to be listed in order, means order matters so permutation is to be used.
Therefore option A 5040 is the right answer.
Since the order of basketball players is important, permutation is used. The problem could be interpreted as the permutation of 7 taken 7 at a time
nPr = n! /(n-r)! = 7! /0! = 5040 ways.
The answer is A.
Answers
Answers
Answer:
y = - 3/10x + 5/2
Step-by-step explanation: