Th z-score is given by:
z=(x-μ)/σ
where:
μ-mean
σ-standard deviation
hence:
z=(240-200)/20
z=2
Idek sorry have a nice day
1The two equivalent equations will be
1. 
2. 
<h3>What is linear equation?</h3>
An equation between two variables that gives a straight line when plotted on a graph.
The required two equivalent equations are


The above equation has no repeating numbers and fulfill the criteria.
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Answer:
x = 5
Step-by-step explanation:
(since the equations are equal to eachother, add similiar factors)
4x - 3 = 2x + 7
+3. -2x
2x = 10
<em>Simplify</em>
x = 5