Evaluate expressions- if A=4 and B=9 what is the value of the following expression 20/a+7•b

A.28

B.33

C.68

D.108

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Astudent survey asked: "how tall are you (in inches)? " here's the data: 67, 72, 73, 60, 65, 86, 72, 69, 74 give the five number summary. a. median: 73, mean: 70.89, iqr: 5, min: 60, max: 74 b. 60, 66, 72, 73.5, 86 c. 60, 67, 72, 73, 74 d. 0, 60, 70, 89, 74, 100

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?