Escercia \( A=3(x \) \( B=(3 x \)

20. La ayuda al desarrollo económico y social del pais, construyendo un México más justo e inclusiva. Sin embargo, auun existen desafios como la calidad. en el acceso a una de

Simplify the expression. \( 7+3(3 n+6)-n \)

* The area of a square shaped card is \( 121 \mathrm{~cm}^{2} \). Find the length of one side of the card

Desmond buys and selis shares in the stock market The value of the shares be bought is given by the function \( y=3 x^{2}-5 x+7 \), where \( y \) is the value of the shares in thousands of dollars and \( x \) is the tume io years after it was first bought. (a) What is the mimmum value of the shares and when does it occur?

An unknown compound has the following chemical formula: \[ \operatorname{Cr}(\mathrm{OH})_{\mathrm{x}} \] where \( x \) stands for a whole number. Measurements also show that a certain sample of the unknown compound contains 7.90 mol of oxygen and 2.63 mol of chromium. Write the complete chemical formula for the unknown compound.