Determine if the statement is always, sometimes, or never true.

An exterior angle of a quadrilateral is 90 degrees.

A submarine's elevation changes - 657 feet over a period of 6 minutes. If the submarine descended at a constant rate, what is the approximate elevation change per minute? -130 feet -90 feet -120 feet -110 feet

What is the first term in the expansion (2x + 10y) 15?

Write - 4.07 as a mixed number

600,000 equals how many ten thousands

I need to know the answer for reasons.

Maya visits the movie rental store. On on wall, therear 6 DVDs on each of 5 shelves. On other wall, there are 4 DVDs on each of 4 shelves. How many dvds are there all?

A universal set contains only sets A and B. If A∩B = Ø and A and B are not the empty set, then all of the following are true except A and B are disjoint. A is equal to B complement. A∪B={} A is not a subset of B.

What is 4 (2y+5) + (-6-4y)

A man invests $5000 in an account that pays 8.5% interest per year, compounded quarterly

The rectangle shown has an area of (y^2+8y+15) m^2 what is the width of the rectangle