8x + y=-16
-3x + y=-5

(-1,-8)

Step-by-step explanation:

8x + y=-16

-3x + y=-5

Multiply the second equation by -1

3x - y=5

Add this to the first equation

8x + y=-16

3x - y=5

11x    = -11

Divide each side by 11

11x/11 = -11/11

x = -1

Now we need to find y

-3x +y = -5

-3(-1) +y = -5

3+y = -5

Subtract 3 from each side

3-3+y = -5-3

y = -8

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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step-by-step explanation: