You are given that 4a-2b=10 and a+c=3. Write an expression in a, b and c that is equal to 23. Give in simplest form.

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 (%)

3x = 729 solve for x plz . it's urgent. will mark

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test