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8090 [49]
2 years ago
7

-x+y=5

Mathematics
2 answers:
photoshop1234 [79]2 years ago
7 0

Answer:

x=-37/3

y=-22/3

Step-by-step explanation:

-2x+2y=10 (1)

2x-5y=12 (2)

(1)+(2) <=> -3y=22

tatyana61 [14]2 years ago
7 0

Answer:

Elimination method is good enough

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the sum of all but one interior angle of a heptagon is 776°. what is the measure of the final interior angle?
soldi70 [24.7K]

Answer:

The final interior angle = 124°

Step-by-step explanation:

A heptagon has 7 sides. The sum of the interior angles formula:

The sum of the interior angles =  (n - 2)180 where n = number of sides.

The sum of the interior angles= (7 - 2)180° = 900°

Six interior angles = 776°.

The final interior angle + six interior angle = 900°

The final interior angle + 776° = 900°      

The final interior angle = 900° - 776°

The final interior angle = 124°

6 0
2 years ago
Patti puts 40 marbles in a bag. Each marble has 3 grams. What us the total mass of the bag of marbles? in grams?
JulijaS [17]
I believe that the answer is 120 marbles.<span />
4 0
3 years ago
Read 2 more answers
ROUND of 1,637,984 OFF to two decimal places​
natka813 [3]

Answer:

1,637,984.00

Step-by-step explanation:

5 0
3 years ago
A system of equations has 1 solution. If 4x – y = 5 is one of the equations, which could be the other equation?
postnew [5]

Answer:

D: 2y = 8x - 10  

Step-by-step explanation:

A:  y = 4x + 5. This has a slope of -4 Yes it could work.

B:  y = 4x - 5. No It does not work

C: 2y = 8x - 10. The slope is 8/2 = 4. So No it could not work.

<u>D: -2y = 8x - 10. The slope is 8/-2 = -4. Yes This Does work!  :)</u>

<u />

8 0
3 years ago
How to make 2/7 =18/ a equivalent fraction
ira [324]
18 ÷ 2 = 9. 

7 x 9 = 63

2/7 = 18/63


8 0
3 years ago
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