Help me with my math work pls

see explanation

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is

AB² + BC² = AC² ( substitute values )

x² + (x + 7)² = 17² ← expand factor on left side using FOIL

x² + x² + 14x + 49 = 289

2x² + 14x + 49 = 289 ( subtract 289 from both sides )

2x² + 14x - 240 = 0 ( divide through by 2 )

x² + 7x - 120 = 0 ← as required

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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