People with type O-negative blood are referred to as universal donors. Although if you give type O-negative blood to any patient, you run the risk of a transfusion reaction due to certain antibodies present in the blood. However, any patient can receive a transfusion of O-negative red blood cells. Only \( 7.2 \% \) of the American population have O -negative blood. If 12 people decimal places.

7. There are approximately \( 1.2 \times 10^{8} \) households in the U.S. If the average household uses 400 gallons of water each day, what is the total number of gallons of water used by households in the U.S. each day?

Solve the system. Use any method you wish. \[ \begin{array}{r}x^{2}-2 y^{2}+7=0 \\ 5 x^{2}+y^{2}=9\end{array} \] List all the solutions. Select the correct choice below and fill in any answer boxes in your choice. A. The solution(s) is/are (Type an ordered pair. Use a comma to separate answers as needed.) B. There is no solution.

c) \( -6 x+\{8 y-(2 x-[4 x-9 y-6 z]-7 x)-6 y\}-(8 x-[3 y-2 z]-9 y) \)

Deaw and label a bar model to show a number that is 5 times as many as 8 . Then write a multiplication equation. Equation:

Use a truth table to determine whether the symbolic form of the argument is valid or invalid. \( p \rightarrow q \) \( \frac{q}{p} \) Valid. Invalid