Can anyone solve these math problems?

Posted on 2015-09-28 06:41:00 in Math by TOMMER

1) If x is randomly chosen from the positive real numbers less than 10, what is the probabily that x + 3/x is equal or less than 4?

2)If the shaded sector of the circle shown has a perimeter of 28 cm and an area of 49 cm squared, what is the length, in centimeters, of the arc of this sector?

3) some students stood evenly spaced in a circular formation. they counted off, starting at 1 and continuing by consecutive integers once around the circle, clockwise. how many students were there if the student furthest from student 19 was student 99?

4) three solid gold spherical balls, with respective diameters of 3,4, and 5, are melted down and recast into a single solid gold spherical ball of diameter d. what is the value of d?

5) for what positive integer c is there only one ordered pair of positive integers (a,b) that satisfies a + b = c?

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