Which of the following shows 453 in expanded form?Which of the following 450 + 50 + 30

4 + 5 + 3

400 + 50 + 3

45 + 3

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

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 : )