Is the expression 5x ^ 2 + sqrt(2x) polynomial ? Justify your response

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?