Answer this and show work and I'll give 100pts after if you Answer all of them find the value if X​

Suppose there are 10 five and six-year-old attending a birthday party. when a 30 year old mother walks into the room with an infant in her arms, what happens to the mean age in the room? what happens to the standard deviation of ages in the room? a. the mean and standard deviation of both change. b. the meaning will change, but the standard deviation will stay approximately the same. c. i mean will stay approximately the same, but the standard deviation will change. d. the mean and standard deviation will both stay approximately the same.

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.