1. The perimeter is 20 units. 2. The perimeter is 25 units
3. The perimeter cannot be determined.
4. The area is 20 units squared
5. The area is 25 units squared
6. The area cannot be determined
7. Quadrilateral ABCD is a parallelogram.
8. Quadrilateral ABCD is made up of two congruent isosceles right triangles.

65

step-by-step explanation:

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

i honestly dont know