Answer:
Answers are below
Step-by-step explanation:
-3x > 9 Divide both sides by -3
x < -3 When you divide by a negative number, flip the inequality sign
3x > 9 Divide both sides by 3
x > -3
When you divide by a negative number, flip the inequality sign. This affects your answer because the first inequality means any number less than -3, while the second inequality means and number above -3
Answer: 2
Step-by-step explanation:
A graph shows the x-intercepts to be x ∈ {1, 4, 7}.
These are the real solutions to the equation.
Answer:
A. -1.6; not significant
Step-by-step explanation:
The z-score of a data set that is normally distributed with a mean of and a standard deviation of , is given by:
.
From the question, the test score is: , the mean is , and the standard deviation is .
We just have to plug these values into the above formula to obtain:
.
This simplifies to: .
.
We can see that the z-score falls within two standard deviations of the mean.
Since the value is not significant.
The correct answer is A. -1.6; not significant
The property that allows 7 + 9 + 3 = 7 + 3 + 9 is called the Commutative Property of Addition and Multiplication. This means that as long as the sign is either a multiplication symbol or an addition symbol, we can move (or "commute") the values wherever we want and the expression will still equal the same amount.
Hope that helped =)