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tatyana61 [14]
3 years ago
6

A high school math teacher is grading her students' tests. The teacher spends about 4 minutes grading each test. The teacher has

a total of 176 students. How long will it take the teacher to grade the tests?
A.8 hours and 34 minutes
B.6 hours and 44 minutes
C.10 hours and 55 minutes
D.11 hours and 44 minutes
Mathematics
1 answer:
gavmur [86]3 years ago
3 0
The answer is D because , 4x176 = 704 which you divide by 60 because thats how many minutes are in an hour which should come out to 11 hours
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Write an equation that is perpendicular to the line 8x-4y=12 and pass through the origin
fenix001 [56]
Answers


Explanation

So first we’re gonna change the equation to y=Mx+b by subtracting the 8x and then dividing both sides by -4. This can be show like this

8x-4y=12
-8x. -8x

-4y=-8x+12
/-4. /-4

Y=2x-3

So now that we have the equation in Y=Mx+b. The problem still isn’t done because it’s asking us to set up an equation that’s perpendicular. Which means the slope becomes the opposite

So the slope isn’t 2 anymore but instead -1/2! So now that we know that we need to make the line go through the origin which is very easy because you can just set the y intercept to 0.

So now that the perpendicular line is

Y=-1/2x or y=-1/2x +0

I hope I explain this well!

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7 0
3 years ago
Sound travels about 335 meters/second. How many kilometers would a sound travel in 1 minute?
Lelechka [254]
If sounds travel 335 meters in 1 second , in 1 minute it travels 60 times that distance :

335m × 60 = 20100 meters
Sounds travel 20100 meters per minute
if 1000 meters = 1 km ,
20100 meters = 20100/1000 km
20100 meters = 20.1 Km

Awnser : Sound would travel 20.1 km in one minute
7 0
3 years ago
Cross products question, 3/5 over x multiplied by 12 over 20<br> what is x
Nitella [24]

Answer:

9/25x

Step-by-step explanation:

3/5/x ×12/20

3/5×1/x ×12/20

36/100x

Divide both by 4

9/25x

The exact value of x cannot be determined because we don't know what the equation is equated to

So we will have to leave the answer as 9/25x

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If the average of 8 numbers is 12, what is the sum of the 8 numbers
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16 Im pretty sure it is.
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He spent $11 dollars minus tax
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3 years ago
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