8х+2y = 46
7x+3y = 47

To solve this problem, we want to make either the x or the y values either equation the same.To work out whether to change the x or the y values, work out the lowest common multiple for each.For x, the values are 7 and 8 so the lowest common multiple is 56For y, the values are 2 and 3 so the lowest common multiple is 6 - this is lower hence we will change the y valuesto get 6y in each equation, multiply the first by 3 (as 2y x 3 = 6y) and the second by 2 (as 3y x 2 = 6y)This will give:24x+6y=13814x+6y=94minusing the bottom equation from the top one will eliminate the y values and give:10x = 44therefore dividing by 10:x=4.4

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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f(x)=2/3x-8, which give g(x) the greatest value.

step-by-step explanation: