Nora wants to find her average grade in her science class. she has earned a score of 85% on two tests, 92% on three tests, and 94% on her most recent test. what is nora’s mean, or average, test score?

Hence, Nora's mean or average score in all the test is:

90%

Step-by-step explanation:

It is given that:

Nora wants to find her average grade in her science class.

She has earned a score of 85% on two tests, 92% on three tests, and 94% on her most recent test.

That means she has given a total of 6 tests.

So, the mean score is calculated as ratio of sum of all the test to the total number of test she appeared in.

Hence, Mean is calculated as:

Hence, Nora's mean or average score in all the test is:

90%

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have