HELP ASAP 60 Points and brainlist P(x) = 3(x^2 +10x +5) - 1(x - k)
what is k if p(x) is divisible by x

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 (%)

Bring the fraction a/a-4 to a denominator of 16-a^2

Evaluate this using ! 0.25^2 x 2.4 + 0.25 x 2.4^2 − 0.25 x 2.4 x 0.65