Answer:
The solution to the system of equations is:
The graph is attached below.
Step-by-step explanation:
Given the system of equations


Let us solve the system of equations using the elimination method

Arrange equation variables for elimination

Multiply y + 2x = 5 by 2: 2y + 4x = 10

subtracting the equations




solve 6x = 18 for x

Divide both sides by 6

simplify

For 2y - 2x = -8 plug in x = 3


Add 6 to both sides

Simplify

Divide both sides by 2

Simplify

Therefore, the solution to the system of equations is:
The graph is attached below.
Answer:
my friends last name is bradley
Step-by-step explanation:
Answer: PSR (Perfect Square Rule) = (x-3/2)^2
The you simplify.... = x^2 - 3x + 9/4
Step-by-step explanation: Factor by using the PSR (Perfect Square Rule). Then you have to simplify.
Hope this helps you out! ☺
The percentage method aids in calculating FIT.
Answer:
2.28% of tests has scores over 90.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

What proportion of tests has scores over 90?
This proportion is 1 subtracted by the pvalue of Z when X = 90. So



has a pvalue of 0.9772.
So 1-0.9772 = 0.0228 = 2.28% of tests has scores over 90.