If 4 is added to half of a number, the result is equal to 8,what is the number​

Cara earns a base pay of $1800 per month at a car dealership plus a commission of 6% of her sales. what are caras total earning in a month in which she sells $40000 worth of merchandise

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Add the two expressions 4.6 x -3 + -5.3 x + 9