Combine like terms to simplify the expression: i suck at math pls help ill even give brainliest 12 + 3y − 8 − 7y =

4 + 4y

5 + 3y

20 − 4y

4 − 4y

12 − 4y

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is