Amare worked twice as many hours as jing they worked a total of 42 hours how xo i do this

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i