Answer:
Step-by-step explanation:
Let x be the random variable representing the set of art exam scores. Since they are normally distributed and the population mean and population standard deviation are known, we would apply the formula,
z = (x - µ)/σ
Where
x = sample mean
µ = population mean
σ = standard deviation
From the information given,
µ = 81
σ = 10
the probability of getting a score lower than 78 is expressed as
P(x < 78)
For x = 78,
z = (78 - 81)/10 = - 0.3
Looking at the normal distribution table, the probability corresponding to the z score is 0.38
Therefore, the percentage of exam scores that are lower than Calvin's score is
0.38 × 100 = 38%
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Factor x²+x-42
First, think of two numbers such that
- If we multiply them we'll get -42
- If we add them we'll get 1
These numbers are:-
7 and -6
Write them here:-
(x+7)(x-6)
<em>Note:-</em>
We don't have to use the Big X method, since the coefficient of x² is 1.
If it's greater than 1, like 2, then the Big X method comes in handy.
<h3>Good luck.</h3>
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Answer:
2,600 students attend the school.
Step-by-step explanation:
We know that 24% of the total students are in twelfth grade, and 624 are in twelfth grade. This means 624 is 24% of the total. We can see that 100 / 24 = 4.167, and if we multiply 624 by 4.167, we get the total students attending the school, 2,600.
36 I looked it up and it says 36
The answer is c The negative to you in the equation indicated that the graph has been shifted down to units. The graph showing enjoy seeing as we shifted in this way