Which equations are true for the values of x, y, and z? Select three options.

X° + 65° = 180°
x° = z°
y° = 65°
x° = 65°
x° + y° + z° = 115°

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms