Please help 15 points

What is the missing value in this equivalent ratio?

20 over 42 = 30 over ?

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Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

Find parametric equations for the line. (enter your answers as a comma-separated list of equations. let x, y, and z be functions of t.) the line in the direction of the vector 5 i + 5 j − 6k and through the point (−4, 4, −2).

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles