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Aneli [31]
4 years ago
10

Emily earned a grade of 80% on a math test that had 20 problems. How many problems on this test did she answer correctly? If Joh

n got 7 problems incorrect on the same test, what was his grade?
Mathematics
2 answers:
Oxana [17]4 years ago
7 0
Someone getting all 20 problems correct would earn a grade of 100%.  Thus, each correct question counts 5%.

If Emily earned 80%, then the number of problems she got correct was (80% / 100%).

Simplify this result.  It represents the fraction of 20 questions that Emily got correct.  Multiply your result by 20 to find the actual number of questions that E. got correct.
galben [10]4 years ago
4 0
0.8*20 = 16 problems answered correctly
If John got 7 problems wrong, then he got 14 problems right.
14/20 = 0.7
Now, convert 0.7 into a percentage.
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Two points have the same y-coordinate but opposite x-coordinates. Which is a possible graph of these points?
Reika [66]

Answer:

A graph with one point in the secound quadrant, and one in the fourth quadrant. (top left answer)

Step-by-step explanation:

X axis is -

Y axis is |

4 0
2 years ago
Read 2 more answers
Two ships leave from the same port. One travels west 84 miles and the other travels 62 miles north. Determine the distance betwe
Lerok [7]
The distance the ships traveled are like the legs of a triangle and the question wants to know the hypotenuse. To find the hypotenuse, use the pythagorean theorem. this is a^2 + b^2 = c^2, with a and b being the legs and c being the <span>hypotenuse.
</span>Plug in known values:
84^2 + 62^2 = c^2
Solve:
84^2 = 7056
62^2 = 3844
7056 + 3844 = c^2
7056 + 3844 = 10900
10900 = c^2
Now you just need to isolate c by finding the square root of both sides.
√10900 = 104.403
√c^2 = c

So c = 104.403, or just 104.40 when rounded to the nearest tenth.
And if c is 104.40, then that means the hypotenuse is 104.40.
And all of that basically means that the distance between the ships is 104.40 miles.
5 0
3 years ago
Two fractions are given. For each one, write its decimal equivalent and determine if the decimal is terminating or non terminati
ziro4ka [17]

Answer:

9/20 yes, 4/15 not. See below

Step-by-step explanation:

Pick 9/20 and multiply numerator and denominator by 5:

9/20 = 45/100

We know that if we divide a number by 100 we need to move the coma as two places left, so:

9/20 = 45/100 = 0.45

And this is a terminal decimal as we know where it ends.

On the other hand if we pick 4/15 let try to divide it (here I will do it 'manually'):

4 |_ 15

we can divide 4 by 15, so we use 40 and begin with a comma

40 |_ 15

      0.

15 enters 2 times in 40 with a rest of 10, so:

40 |_ 15

  30  0.2

  100

100 divided by 15 is 6 and we have 10 as rest again, and again and again...

40 |_ 15

  30  0.266.....

  100

    100

      ....

So, we will have 0.266666666666666 infinitely. The decimal for 4/15 is non terminating and is 0.26666666666666666...

6 0
3 years ago
F - 3/4=5/6. Please answer soon thanks
ad-work [718]
F - 3/4 = 5/6
Add 3/4 to both sides to get
F = 5/6 + 3/4 = 19/12
5 0
3 years ago
What is the measure of EG?
IrinaVladis [17]
The first thing you should know in this case is that a circumference has a total measure in 360 degrees.
 We have then that the formula to find EG in this case is:
 EG + GF + FE = 360
 We cleared EG:
 EG = 360-GF-FE
 We substitute the values:
 EG = 360-83-66
 EG = 211
 Answer
 EG = 211 degrees.
7 0
3 years ago
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