Help me please and thanks

Answer choice B

Step-by-step explanation:

To find the answer here, you can set up a simple ratio. The length of one of the legs of the smaller triangle is 6, while the new one has a length of 4+6=10. 6:10=9:x, meaning that x= 15 units, or answer choice b. Hope this helps!

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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1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0