What value of n makes the equation true? (2x^9 y^n) (4x^2 y^10) = 8x^11 y^20

Evaluate 26:2+532-3.

In how many months were there more than two days with thunderstorms?

A quadrilateral has perpendicular diagonals. is this enough to determine what type of quadrilateral it is?

Maggie used the commutative property to write StartFraction 4 Over 5 EndFraction + 6.9 y minus 8 as the equivalent expression 6.9 y + 8 minus StartFraction 4 Over 5 EndFraction. Did Maggie apply the commutative property correctly? Why or why not? a.

Evaluate the discriminant of each equation. Tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Last year, a construction worker had a gross income of 29,700 of which he contributed 7% to his 401 (k) plan. If he got paid monthly, how much was deducted from each paycheck for his 401 (k) plan?

Find the circumference of both circles. Use 3.14 for a 6 in. 9 in.

Determine which of the following ordered pairs satisfies the given system of equations. {-2x+y=8 y=2x/5 - 8 Select all that apply: (72,-72) (-3,2) (-1,5) (-2,-445) (-10,-12)

Suppose that you are running a concession stand when a person gives you $18 and asks for six soft drinks and as many hot dogs as the remaining money will buy. If soft drinks are $1.00 and hot dogs are $1.

Solve. Write the solution set in interval notation. x + 7 ≥ 4x - 2