Expression: -(4x-5)+2C%-is)
Choose X-1
Expression-2x - 5
Choose x= -1
Step 1:
Choose a value
of x
Step 2
Substitute
Step 3: Evaluate
-(4(1)-5)+2(1-3)
--2-1)-5
-(4(1)-5)+2(1-3) --(-1)+2(-2)
1-2(-1)-5-2-5
--3
-3
Since 3 = -3, the two expressions are equivalent.
Step 4
Compare
Which explains whether Sophia is correct?
She is correct because the value of the two expressions are the same in Step 3.
She is correct because she substituted opposite values in Step 1.
She is not correct because she did not substitute the same number in both expressions in Step 1.
She is not correct because she did not perform the correct order of operations in Step 3.
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Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq less than 132. the probability that a randomly selected adult has an iq less than 132 is?