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aev [14]
3 years ago
9

Solve system by elimination -9x+7y=22 9x-5y=-26

Mathematics
1 answer:
alisha [4.7K]3 years ago
3 0

Answer:

The solution would be (-4, -2)

Step-by-step explanation:

To find this simply add the two equations together.

-9x+7y=22

9x-5y=-26

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

2y = -4

y = -2

Now we have the y value, we can solve for the x value.

9x-5y=-26

9x-5(-2)=-26

9x+10=-16

9x=-36

x = -4

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Y_Kistochka [10]
The answer to question one would be "D" y<-3

For question two the answer would be "C" x<5

Hope that helps!
6 0
3 years ago
Please help me i am desperate please (1/3)
Sergeu [11.5K]

I think we're not supposed to do more than 3 problems in one answer; certainly not five pages. Does the 1/3 mean there are 10 more to come?

I'll do the first page.

6)

Right triangle, opposite side of 10, adjacent side of 21,

tan x = opp/adj = 10/21

x = arctan 10/21 = 25.46°

Answer: 25

7)

cos x =   adj / hyp = 10/14

x = arccos 10/14 = 44.42°

Answer: 44

8)

tan x = opp/adj = 12/24 = 1/2

x = arctan 1/2 = 26.57°

Answer: 27

9)

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x = arctan 31/32 = 44.09°

Answer: 44

10)

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8 0
3 years ago
3. In an experiment a scientist mixes together three substances. She mixes 18.42 g of
Harman [31]

Answer:

6.24

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A= 18.42g, B = 5.8g,C = 0.75g

Total = 18.42 + 5.8 + 0.75

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7 0
3 years ago
You need to buy 12 pounds of chicken for a barbecue that you are planning. You found an ad in the Northwest Florida Daily News t
Keith_Richards [23]

Answer:

yes

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The difference in the cost per pound is $6.

For 12 lb, the total difference in $6 × 12 = $72.

If the Fresh Market is close enough and you have the time, it is worth the drive since you will save $72.

5 0
2 years ago
Jeff wants to buy tickets for a football game for his friends. The stadium is selling tickets for $7 each. The stadium requires
aniked [119]

Your answer is D){28, 42, 56, 70, 84}

To answer this question you just have to make sure the amount he pays is a multiple of 7.If you know you times table then this should be easy

Times table of 7:

7,14,21,28,35,42,49,55,63,70,77,84.

Now you just need to find an answer choice who has these numbers.Lets check it out!

A) 11 isn't a multiple of 7

B) 56 isn't a multiple of 7

C) None of these are multiples of 7 except 7 so this is also incorrect

D) This is correct because they are all multiples of 7

Hope this makes sense.

7 0
3 years ago
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