\( x, y \in R^{+} \)olmak üzere, \( x \cdot y=5 \) \( x^{2}+y^{2}=15 \) olduğuna göre, \( x+y \) toplam

\( 1<\quad \begin{array}{r}\text { Determine whether the ordered pair }(4,5) \text { is a solution of the system. } \\ \begin{array}{r}3 x+2 y=2 \\ 2 x+y=3\end{array}\end{array} \)

\( 1 \leftarrow \quad \begin{array}{r}\text { Solve the system of equations by the substitution method. } \\ \begin{aligned} x+y & =-2 \\ y & =-2 x\end{aligned}\end{array} \)

What should be, subtracted from \( 8 x-3 y+4 \) to get \( 3 x-2 y+4 \).

What is the value of one third the determinant of \( \left[\begin{array}{cccc}2 & 3 & 0 & 11 \\ 3 & 5 & -1 & 10 \\ 0 & -6 & 2 & 4 \\ 2 & 4 & 7 & -5\end{array}\right] \) ?

\( 8 x y \) is a monomial expression. Is the statement true or fause?