Urgent these are just 3 easy fill in the blank math problems.

1. when adding *blank* signs in addition you should add and keep the sign

2. when subtracting integers you can change the minus to a plus and take the *blank* of the next number. then follow addition integer rules.

3. when adding *blank* signs in addition you should subtract and keep the sign of the larger number.

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

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.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie