8. Perform the indicated operation (2 points each item) 7. 4x + 5x =
4y-5y =
2. 4x 5x =
-Ay-(-5y) =
3. (4x + 5x) + (4y -5y) =
4. (4x + 5x) - (4y -5y) =
5. (-4x + 4y) - (5x + 5y) =​

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Bobs burgers bam has a special deal of 4 hamburgers for $6. at that rate, how much should it cost to buy 3 hamburgers?

What is number 31 as a sum of tens and ones?