The given equation: y=4r-9
Substitute the value of x=3 into the equation
y= 4(3) -9
y= 12-9 subtract
y=3
Answer (3,3)
Answer:
The probability is
Step-by-step explanation:
From the question we are told that
The proportion that live with their parents is
The sample size is n = 125
Given that there are two possible outcomes and that this outcomes are independent of each other then we can say the Recent census data follows a Binomial distribution
i.e
Now the mean is evaluated as
Generally the proportion that are not staying with parents is
= >
The standard deviation is mathematically evaluated as
Given the n is large then we can use normal approximation to evaluate the probability as follows
Now applying continuity correction
Generally
So for the z - table
<span>x - 4 / y + 2 = 5
x - 4 = 5(y + 2)
x = 5y + 10 + 4
x = 5y + 14
</span>
50.826—>50.83
Here is the answer
Answer: the plain pencil costs 10 cents and the colored pencil costs 20 cents