PLSSS HELP GIVING 5 POINTS PLUS BRAINLIEST The Ridgeport school district collected data about class size in the district. The table shows the class sizes for five randomly selected kindergarten and seventh-grade classes. Number of students in randomly selected class Mean Mean absolute deviation Kindergarten 19, 19.23, 30, 19 22 3.6 Seventh grade 27, 33, 34, 30, 31 31 2.0 Based on these data, which statement is true? A. The average size of a seventh-grade class is larger and varies more than that of a kindergarten class. O B. Every seventh-grade class has 9 more students than a kindergarten class O C. The average size of a seventh-grade class is larger but varies less than that of a kindergarten class. D. The recommended number of students in a kindergarten class is 22.​

something that characterises a right triangle is the fact that we may use pythagoras' theorem to find any one of its sides given that we have the length of the other two sides. here, we have the length of the hypotenuse, √(87) yd, and one other side, √(23) yd, thus we can easily find the length of the remaining side using pythagoras' theorem as defined below:

c^2 = a^2 + b^2, where c is the length of the hypotenuse, and a and b are the lengths of the other two sides.

thus, given that c = √(87) and a = √(23), we may substitute these into the formula we defined above to get:

c^2 = a^2 + b^2

(√87)^2 = (√23)^2 + b^2 (substitute c = √87 and a = √23 into the equation)

87 = 23 + b^2 (evaluate (√87)^2 = 87 and (√23)^2 = 23 - remember that the square root of a number, squared will equal that very same number)

64 = b^2 (subtract 23 from both sides)

√64 = b (take the square root of both sides)

8 = b (evaluate √64 = 8)

therefor, the length of the unknown leg in the right triangle is 8 yd (first answer).

idn

step-by-step explanation:

okay..i will pick 8!