If y=10 when x=15 find x when y=35

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.