Did you say nevermind so I will just take these free points
Answer:
99.38%
Step-by-step explanation:
We have that the mean (m) is equal to 124, the standard deviation (sd) 6.4 and the sample size (n) = 64
They ask us for P (x <126)
For this, the first thing is to calculate z, which is given by the following equation:
z = (x - m) / (sd / (n ^ 1/2))
We have all these values, replacing we have:
z = (126 - 124) / (6.4 / (64 ^ 1/2))
z = 2.5
With the normal distribution table (attached), we have that at that value, the probability is:
P (z <2.5) = 0.9938
The probability is 99.38%
Answer:
Step-by-step explanation:
Elimination method involves making two coefficients equal in order to get rid of one variable and finding the other.
Graphing method is using the intercepts the plotting your points on a graph.
Substitution method involves using change of subjects and then substituting the equation for the variable.
Answer: if you want to know what x is then x = -10
Step-by-step explanation:
−2(x+12)=−x−14
Use the distributive property to multiply −2 by x+12.
−2x−24=−x−14
Add x to both sides.
−2x−24+x=−14
Combine −2x and x to get −x.
−x−24=−14
Add 24 to both sides.
−x=−14+24
Add −14 and 24 to get 10.
−x=10
Multiply both sides by −1.
x=−10
