Answer:
it's b
Step-by-step explanation:
hope this helps! :D
Answer:
The z-value rounded to the nearest hundredth is -1.64
There is no enough evidence to reject the claim.
Step-by-step explanation:
A certain website claims that it averages 4.7 hours of downtime per month.
No. of samples = n = 17
Mean =
Standard deviation =
Formula:
Z =−1.64
Z critical at 90% is 1.65
Since Z calculated < Z critical
So, there is no enough evidence to reject the claim.
Answer:
x= −5
/3
Step-by-step explanation:
91. Robert needs 6 cookies and 2 brownies for every 4 plates he makes for a bake sale. Now, he need to make 10 plates. How many cookies and brownies will he need to be able to make this 10 plates.
Solve:
=> 4 plates = 6 cookies and 2 brownies
=> 8 plates = (6 cookies + 6 cookies) and (2 brownies + 2 brownies) = 12 cookies and 4 brownies
=> 10 plates = (12 cookies + 3 cookies) and (4 brownies + 1 brownies) = 15 cookies and 5 brownies in all.