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gayaneshka [121]
3 years ago
7

The school district reports that the student to computer ratio is 10:1. In a class of 25 students, how many computers would ther

e be
Mathematics
2 answers:
Pani-rosa [81]3 years ago
5 0
Well, its Students to Computers.  So basically it's student: computers.  For every 10 students, there is 1 computer.
Sedaia [141]3 years ago
4 0
I don’t know but keep trying
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If the ratio of dogs to cats at an animal shelter is 2:5, then the number of cats is _____ times the number of dogs.
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I don't understand what I'm supposed to do here. I have a test on this tomorrow so if you explain how to do it that would be gre
VladimirAG [237]
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ounce = 2.93 pounds ( \frac{16 ounces}{1 pounds} ) = 46.88
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3 0
3 years ago
How to solve using substitution<br> y=3/4X+5<br> 4x-3y=-1
Pachacha [2.7K]
Please, use parentheses to enclose each fraction:
y=3/4X+5 should be written as <span>y=(3/4)X+5

Let's eliminate the fraction 3/4 by multiplying the above equation through by 4:

4[y] = 4[(3/4)x + 5]
Then 4y = 3x + 20
(no fraction here)

Let 's now solve the system   

4y=3x + 20
4x-3y=-1

We are to solve this system using subtraction.  To accomplish this, multiply the first equation by 3 and the second equation by 4.  Here's what happens:

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Then we have 

 12y = 9x + 60
-12y =-16x - 4

If we add here, 12y-12y becomes zero and we then have 0 = -7x + 56.
Solving this for x:  7x = 56; x=8

We were given equations   
</span><span>y=3/4X+5
4x-3y=-1

We can subst. x=8 into either of these eqn's to find y.  Let's try the first one:

y = (3/4)(8)+5 = 6+5=11

Then x=8 and y=11.

You should check this result.  Subst. x=8 and y=11 into the second given equation.  Is this equation now true?</span>
5 0
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