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Alborosie
3 years ago
9

You just received your final exam score from your teacher. At the top of the exam, it says you missed three questions and got 42

out of 45 questions correct, for a score of 88%. You think your teacher may have made an error when calculating your percentage. If your teacher did make a mistake, what was most likely done incorrectly?
Mathematics
2 answers:
True [87]3 years ago
4 0

Answer:

Yes she made an error.

Step-by-step explanation:

42/45 = 0.93333

0.93333 × 100 = 93.3333

I'm not sure what she did wrong but maybe she added 3 to the 45 total to get 42/48 = 87.5 which rounds to 88.

Leno4ka [110]3 years ago
3 0

Answer:

below

Step-by-step explanation:

I would guess that they added 42 and 45 and then added 1 for their mistake. That might be a bit of stretch, but that is what I think

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Find the measure of angle FED and DEN. Thx!!!! :)
Katena32 [7]

Answer:

m<FED=60, m<DEN=120

Step-by-step explanation:

m<FED=60

This is because <GEN and <FED are vertical angles.

Vertical angles are always congruent.

Vertical angles are formed by a pair of intersecting lines, and are the angles directly across from one another.

m<DEN=120

This is because <DEN and <GEN are supplementary.

Supplementary angles add up to 180 degrees.

We know this because a straight line is always 180 degrees.

So:

m<DEN+m<GEN=180

m<DEN+60=180

m<DEN=120

6 0
3 years ago
Find the GCF for the list.<br> 18y3, 45y²
vlabodo [156]
Since 9 goes into 18 and 45, and both of the integers has a y2, the GCF is 9y2
3 0
3 years ago
Please help! I will mark the 1st answer as brainiest.
uranmaximum [27]

Answer:

256 m^2

Step-by-step explanation:

area = b x h

16 x 16 = <em>256</em>

both combined would be <em>512</em>

4 0
3 years ago
Read 2 more answers
3(12x – 9) + 9 = 2x + 4<br> Would this be infinite solution, one solution or no solution?
timama [110]

Answer:

One solution

Step-by-step explanation:

Let us first <u>expand</u> the left side of the equation to rid of the parenthesis:

3*12x-3*9+9=2x+4\\36x-27+9=2x+4\\36x-18=2x+4

Now let us <u>isolate</u> the variable to sove for x:

36x-2x=4+18\\34x=22\\x=\frac{22}{34}\\x=\frac{11}{17}

Therefore, x=\frac{11}{17}. As you can see, there is just one solution.

<em>I hope this helps! Please let me know if you have any further questions :)</em>

8 0
2 years ago
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elixir [45]

Answer:

B

Step-by-step explanation:

use the exponent rule of division: you just subtract the exponents if the base is the same, so 4-8=-4

5 0
3 years ago
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