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slega [8]
3 years ago
13

Anyone know the answer?

Mathematics
1 answer:
bogdanovich [222]3 years ago
7 0

Answer:

Step-by-step explanation:

This is of the form

f(x)=a(x-h)^2+k

where h and k are the coordinates of the vertex, and the values that tell us the translation of the parent graph from its starting point (which is always the origin).  The 2 out front, the a value, tells us that the graph of this parabola is a bit slimmer than the parent graph, but does nothing to its translation (or movement).  It does, however, tell us which way the parabola opens.  Because the parabola opens upwards, the 2 is positive. The h value tells us our side to side movement.  The "(x - " part is very important because it doesn't change.  If we have (x - 2), then it is understood to be (x - (2)) which is movement 2 units to the right (because positive numbers move right or up, while negative numbers move left or down).  If we have (x + 2), then it is understood to be (x - (-2)) which is movement 2 units to the left.  Because our parabola is shifted 2 units to the right, it reflects (x - 2) squared.  It is shifted up 2 so the k value is a +2.  The equation for this parabola could be B only.

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Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was
Marizza181 [45]

Answer:

The raw score for his exam grade is 99.69.

Step-by-step explanation:

Given : The professor announced that the mean for the class final exam was 88 with a standard deviation of 7. Given Daniel's z score of 1.67.

To find : What is the raw score for his exam grade?

Solution :

The formula use to find the z-score is

z=\dfrac{x-\mu}{\sigma}

Where, z=1.67 is the z-score

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x  is the raw score for his exam grade

Substitute the values,

1.67=\dfrac{x-88}{7}

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x=88+11.69

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Therefore, the raw score for his exam grade is 99.69.

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