3х + Зу = 27
x — Зу = -11
Solving using elimination?

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

What is r i 4.5+10r=-6.5 with work pls