12 gallons of water fill a tank to 3/4 capacity, what is the capacity of the tank

Aright triangle has an area of 18 square inches. b: if the triangle is not an isosceles triangle, what are all the possible lengths of the legs, if the lengths are whole numbers. answer !

Empty box + box + empty box fill in the box is equal to 30 how

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove