Answer:
Step-by-step explanation:
Y= -3x + 4..........(1)
Y= 4x - 10...........(2)
Substituting (1) into (2)
-3x + 4 = 4x - 10
-3x - 4x = -10 - 4
-7x = -14
x = -14/-7
x = 2
Putting x in (2)
y = 4(2) - 10
y = 8 - 10
y = -2
Part A:
From the central limit theorem, since the number of samples is large enough (up to 30), the mean of the the mean of the average number of moths in 30 traps is
0.6.
Part B:
The standard deviation is given by the population deviation divided by the square root of the sample size.

Part C:
The probability that an approximately normally distributed data with a mean, μ, and the standard deviation, σ, with a sample size of n is greater than a number, x, given by

Thus, given that the mean is 0.6 and the standard deviation is 0.4, the probability that <span>the average number of moths in 30 traps is greater than 0.7</span> given by:
9 × 5 = 45
3 × 0.2 = 0.6
1 × 0.05 = 0.05
45 + 0.6 + 0.05 = 45.65kg.
Answer:
12/40 = 3/10
Step-by-step explanation:
That is the possible answer
Unit rate is useful because it describes how much of something can be done in a certain amount of time. For example, if a car is going 80 kilometers an hour, you can determine how long it will take the car to reach it's destination if given the distance. Without unit rate it would be difficult to describe this.