Mr. Roble is buying a lot of music on iTunes this week. On Monday, his bank account was at $30. On Tuesday, he bought 7 songs at $1.99 each. On Wednesday, he deposited $10 into his account. On Thursday, he bought 4 albums for $7.99 each. On Friday he received a check from work and deposited some of the check to get his account balance back to 0.

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.

Precalculus question, image attached.

Drag each expression to the correct location on the solution. not all expressions will be used. consider the polynomial 8x + 2x2 - 20x - 5. factor by grouping to write the polynomial in factored form.