Answer: n + d = 30
0.05n + 0.10d = 2.20
^^ ur system of equations
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given data
Number of balls= 480
we are told that 50%(half) of the balls are put back every 1
let the number of hours be x
and let the remaining ball be y after x hours
Hence the expression is given as
Answer:
Yes, the conditions for inference are met
Step-by-step explanation:
Conditions for inference:
To build a confidence interval for a population proportion, the sample must have at least 10 successes and 10 failures.
In this question:
50 cars, 11 have damage and 50 - 11 = 39 do not.
Since both the number of sucesses and of failures is above 10, conditions for inference are met.
Answer $37.12
Step-by-step explanation:
32 * 16% = 5.12
5.12+32= 37.12
First, determine the width of the court by dividing the area by the length.
width = area / length
width = 162 m²/18 m = 9 m
Then, determine the perimeter of the court by the equation
P = 2L + 2W
where L and W are length and width, respectively.
P = 2(18m) + 2(9m) = 54 m
Given that every 20 m roll of tape costs $2.79, and even if the court is only 54 m, Jeff still needs to buy 3 20-m roll
total cost = ($2.79) x 3 = $8.37
Thus, the answer is letter B.
