Solve \( 2 x^{2} 4 x=10 \) by completing the square.

Solve the equation. If necessary, round to the nearest thousandth. \( 7^{x+3}=6^{x} \) A. \( \{37.87\} \) B. \( \{-39.33\} \) C. \( \{-37.87\} \) D. \( \{-36.41\} \)

Simplify. \[ \frac{10 y^{2}-25 y}{5 y^{2}-15 y} \]

\( x-4+2 x=8 \) whats \( x+3 \)

a) \( 7 x+(3 x-5)=6 x-9 \)

Find the range of the quadratic function, \[ y=-3 x^{2}-12 x-15 \] Write your answer as an inequality using \( x \) or \( y \) as appropriate, Or, you may instead click on "Empty set" or "All reals" as the answer, प<ロ \( \square>\square \)