8 find the missing length

C) 15m

Step-by-step explanation:

Since this is a right triangle (we know this since the box in the top left of the image shows that angle is 90°) We can use the pythagorean theorem.

formula for the pythagorean theorem = a² + b² = c²

The easiest way to think about this is to just know that the long side (our missing side in this case) is "c."

So, we plug our numbers in: (it doesn't matter which legs of the triangle you use for "a" or "b")

9² + 12² = x²

9² = 81

12² = 144

81 + 144 = 225

now we know the missing side (squared) is 225. All we need to do is just find the square root () of 225.

= 15

15 is your answer.

step-by-step explanation:

ask goog great chance of finding the solution there

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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