4. A Premier League footballer is valued at £30 million and after a bad season his transfer value depreciates by \( 20 \% \). His nexi season is a good one and his transfer value now appreciates by \( 20 \% \).

Solve the system with the addition method: \( \left\{\begin{array}{l}2 x-6 y=32 \\ x+7 y\end{array}\right. \) Answer: \( (x, y)=-24 \) Preview \( x \) Preview \( y \) Enter your answers as integers or as reduced fraction(s) in the form A/B.

Con 15 metros de cinta amarilla, se hacen 5 adornos del mismo tamaño, sin que sobre cinta. ¿Cuántos adornos del mismo tamaño que los amarillos se hacen con 30 metros de cinta azul sin que sobre cinta?

SITUACION 4: Un capital prestado al \( 20 \% \) durante 5 meses; luego el monto obtenido es depositado en uni financiera que paga el \( 24 \% \) anual, pero por 3 meses retirándose al cabo de ese tiempo \( 5 / .2067 \). ¿Cuál es e capital inicial?

Use the quadratic formula to solve for \( x \). \[ 2 x^{2}+5 x-1=0 \] Round your answer to the nearest hundredth. If there is more than one solution, separate them with commas.

Perform the operation. Simplify the result, if possible. \[ \frac{7}{t^{2}+t-42}+\frac{1}{t^{2}+3 t-54} \]