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saul85 [17]
2 years ago
14

Use the elimination method to solve the system of equations. Choose the

Mathematics
1 answer:
kherson [118]2 years ago
8 0

Answer:

x=1,y=-2. (1, -2).

Step-by-step explanation:

5x-2y=9

3x+4y=-5

----------------

2(5x-2y)=2(9)

3x+4y=-5

-------------------

10x-4y=18

3x+4y=-5

--------------

13x=13

x=13/13

x=1

5(1)-2y=9

5-2y=9

2y=5-9

2y=-4

y=-4/2

y=-2

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pentagon [3]

Answer:

= x 3048

Step-by-step explanation:

6 0
2 years ago
find the difference between the sum of all eight positive intergral divisors of 66 and the sum of all eight positive integral di
katrin [286]

The difference between the sum of all eight positive integral divisors of 66 and the sum of all eight positive integral divisors of 70 is zero.

<h3>How to find the difference between the integral divisors?</h3>

First let's find the integral divisors. We can write 66 as a product of prime numbers as:

66 = 33*2 = 2*3*11

Then the integral divisors of 66 are:

2

3

11

2*3 = 6

2*11 = 22

3*11 = 33

1 (trivially)

66 (trivially)

The sum gives:

2 + 3 + 11 + 6 + 22 +33 + 1 + 66 = 144

For 70 we have:

70 = 7*10 = 2*5*7

Then the integral divisors are:

1

70

2

5

7

2*5 = 10

2*7 = 14

5*7 = 35

The sum gives:

1 + 70 + 2 +5 + 7 + 10 + 14 + 35 = 144

Then the difference between these two sums is:

144 - 144 = 0

If you want to learn more about integral divisors:

brainly.com/question/4785696

#SPJ1

7 0
1 year ago
Tina and Tracey are putting 70 things from their present lives into a few boxes, and they are going to bury the boxes so they ca
vlada-n [284]

number of full boxes is 2

things left over is 10

6 0
3 years ago
Read 2 more answers
An office manager spent $4870 on a
Andrews [41]

Answer:

6 chairs

8 desks

Step-by-step explanation:

First, we assume that all 14 items he bought were chairs, if that was to be true then the office manager would spend...

125 x 14 =  1750$

We see that he spent less then he should have so now we start to substitute desks instead of chairs, and we have to keep in mind that if we change 1 chair to a desk then the total will increase by...

515 - 125 = 390$

Now we just find the difference between the needed total and the total that we get if the office manager would by only chairs and then divide the result by 390 in order to find the number of desks, and so we get...

(4870 - 1750) / 390 = 3120 / 390 = 8 desks

And now that we know the number of desks we just subtract the number of desks from 14 and get the number of chairs, and so...

14 - 8 = 6 chairs

7 0
2 years ago
Which equation represents the line that passes through the points (6,9) and (3.5)?
sukhopar [10]

the answer is y=2x-3

You can look at my work if you really need to

5 0
3 years ago
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