The area of a trapezoid is 18km squared, with bases 5 km and 7 km. What is the height, in kilometers?

Sheila has $4.75 to buy pencils for art class. Each pencil costs 89¢. a) Estimate the number of pencils she can buy. b) Calculate the number of pencils she can buy.

Explain why the polynomial 144x2 - 200x + 81 is not a perfect square. A. 81x ≠ 2 (20x ∙ 9) B. 144x ≠ 2 (20x ∙ 12) C. 200x ≠ 2 (9x ∙ 12) D200x ≠ 2 (12x ∙ 9)

The mean GPA in a class of 14 students is 3.12. One student, whose GPA is 2.41, drops the class. Two new students, whose GPAs are 3.97 and 4.26, join the class. What is the new mean GPA of the class?

Use the discriminant and select whether the roots of 4x 2 - 3x + 3 = 0 are real or imaginary.

Solve the equation. -9x + 1 = - x + 17

The sector enclosed by  BCD in the circle below represents the section of a park used by the chamber of commerce for a fundraising event. What is the approximate area of the section of the park they want to use? A. 339 square feet B.

Triangles ΔABC ≅ ΔBAD so that C and D lie in the opposite semi-planes of segment AB. Prove that segment CD bisects segment AD.

Solve the equation 7 - (4^2-10) + n=10

Cheese cost 440 per pound find a cost per kilogram

Is 12 a rational or integer or whole