Mr. chan made 252 cookies for the annual fifth grade class bake sale . they sold 3/4 of them and 3/9 of the remaining cookies were given to p. t.a members . mr. chan allowed the 12 student to divide the cookies that are left equally how many cookies will each student get. hurry i need

Answer

Find out the  how many cookies will each student get.

To prove

As given

mr.chan made 252 cookies for the annual fifth grade class bake sale .

they sold of them

Than

                                                = 189

Number of cookies left after sold = 252 - 189

                                                       = 63

of the remaining cookies were given to P.T.A members .

Than

                                                                                               = 21

Number of cookies left after giving to P.T.A members = 63 - 21

                                                                                          = 42

As given

mr.chan allowed the 12 student helper to divide the cookies that are left equally.

                                                     = 3.5

Therefore the 3.5 cookies each student gets.

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).