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uysha [10]
2 years ago
14

I need help pls only today sorry I forgot to finish only 10 11. 12

Mathematics
2 answers:
bagirrra123 [75]2 years ago
6 0

10. If it rained 7/10 of the days, 3/10 days did not receive rain.

90 days multiplied by 3/10 is 27.

It would not rain about 27 days in the 90 days.


11. x multiplied by 8 and a half equals 5.

(8 and 1/2)x = 5

x = .588235 which is about 6/10


12. C = 6/10 and D = 8/10 so the product would be 48/100 which is close to 5/10. This point is N.

azamat2 years ago
4 0
10: 27 (because it did not rain 3 out of 10 days, multiplying both by 9 gives us 27 out of 90 days of no rain)

11: 0.588 (because that is about 5/8.5)

12: N (because C is at 0.6 and D is at 0.8, and their product is 0.48)
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Therefore,

(x , y)                YES / NO

(-4, -5)           Yes, It is a Solution.

(1 , - 3)           No, not a Solution.

(9 , 6)            No, not a Solution.

(-6 , 2)           No, not a Solution.

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Given:

4x-7y=19

To Determine:

Given ordered pair is a solution or not ?

Solution:

For (-4,-5)  

Substitute x = -4 and y = -5 in above equation

Left Hand Side   = 4 × (-4) - 7 × (-5)

                           = -16+35

                           = 19

Right Hand Side = 19

Left Hand Side = Right Hand Side  

Satisfied

Hence (-4, -5) is the SOLUTION to 4x - 7y =19  (YES)

For (1, -3)  

Substitute x = 1 and y = -3 in above equation

Left Hand Side = 4 × (1) - 7 × (-3)

                         = 25

Right Hand Side = 19

Left Hand Side ≠ Right Hand Side  

Not Satisfied

Hence (1, -3) is NOT the Solution to 4x - 7y =19  (NO)

For (9, 6)  

Substitute x = 9 and y = 6 in above equation

Left Hand Side = 4 × (9) - 7 × (6)

                         = -6

Right Hand Side = 19

Left Hand Side ≠ Right Hand Side  

Not Satisfied

Hence (9, 6) is NOT the Solution to 4x - 7y =19  (NO)

For (-6, 2)  

Substitute x = -6 and y = 2 in above equation

Left Hand Side = 4 × (-6) - 7 × (2)

                         = -38

Right Hand Side = 19

Left Hand Side ≠ Right Hand Side  

Not Satisfied

Hence (-6, 2) is NOT the Solution to 4x - 7y =19  (NO)

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(1 , - 3)           No, not a Solution.

(9 , 6)            No, not a Solution.

(-6 , 2)           No, not a Solution.

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