Suppose P = {red, blue, green, yellow}, Q = {red, green, black}, and R = {black, green, purple}. Which set is equivalent to ( P ∪ R ) ∩ Q ( P ∪ R ) ∩ Q ?

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.