Which equation shows the result of 42 divided by 15?

42=2x15+12
42=20x2+4
42=10x4+2
42=5x3+27

What is the equation of the graph below? y=sec(x)-4

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.

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?