Eric earned 60 points on his last test. If there were 75 possible points, what was his percent grade?

2 answers:

8 0

This is a proportion problem. Eric earned 60 out of a possible 75 points, so the ratio is 60/75. You put that equal to x, so 60=x% and 75=100%. So it would look like
<u>60</u> = <u> x </u><u>
</u>75<u /> 100
then you cross multiply 60 and 100, and 75 and x, so you get
6000=75x
then divide by 75 and you have your percent :)

lesya [120]3 years ago

4 0

You change a fraction into a percentage by multiplying by 100.

So, for example, half is 1/2. Multiply by 100 gives 100/2=50. So half is 50%.

Here we know that Eric earned 60 points out of a possible 75. So the percentage is:
60 (the points he earned) / 75 (possible score) * 100
= 6000/75 we can simplify by dividing the numerator and denominator by 5
= 1200/15 and simplify again by dividing both by 5
= 240/3 = 80. So Eric got 80%

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Find the coordinates of C' after a reflection across the line

iragen [17]

<h3>Answer: (4,2)</h3>

==============================================================

Explanation:

C is at (0,0). Ignore the other points.

Reflecting over y = 1 lands the point on (0,2) because we move 1 unit up to arrive at the line of reflection, and then we keep going one more unit (same direction) to complete the full reflection transformation. I'll call this point P.

Then we reflect point P over the line x = 2 to arrive at the location Q = (4,2). Note how we moved 2 units to the right to get to the line of reflection, and then keep moving the same direction 2 more units, then we have applied the operation of "reflect over the line x = 2"

So we have started at C = (0,0), moved to P = (0,2) and then finally arrived at the destination Q = (4,2). This is the location of C' as well.

All of this is shown in the diagram below.