With this my
what is 3--4? i do know it's equal to 3+4 but i always wonder what is this considered to be as it's more easier to use 3+4 then why 3--4 is still be used in maths since we don't use it in real life and plz give me examples for its uses

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

What is x3+3x2−16x−48 divided by x−1?