What are some characteristics for a good math explanation

Which of the following statements are true? The median is the arithmetic average of a data set. The median is the middle value of a data set when the data are ordered from least to greatest.

If two triangle share a side, are they congruent

4) Dan had 199 dollars to spend on 7 books. After buying them he had 17 dollars. How much did each book cost?

Given the function f (x) = - 5x^2-x+20 find f (3)

Write this trinomial i'm factored form. 5s^2-13s+6

The shaded figure is a rhombus. The area of the shaded section is 60 square units. What is the value of x? 4 units 6 units 8 units 9 units

What is the multiple zero and multiplicity of x^3+2x^2+x

Original grade 80 New grade 100 Find the percent of increase

What is the solution to the system of equations? Use the substitution method. j + k = 3 j - k = 7 A. The solution is (8, 1) B. The solution is (5, - 2) C. There is no solution. D. There are an infinite number of solutions.

What is the height of the cylinder in the diagram? Round your answer to the nearest whole number.