What is the solution to this system of equations? x+2y=4 2x-2y=5 a. (3, -5.5) b. (3, 0.5) c. no solution d. indefinitely many solutions

b.  (3, 0.5).

Step-by-step explanation:

x + 2y = 4

2x - 2y = 5

Adding the 2 equations eliminates the y:

3x = 9

x = 3

Substitute fro x in the first equation:

3 + 2y = 4

2y = 1

y = 0.5.

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

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