Drusilla replaces the light bulb in the hall closet every 9 months and replaces the air filter every 6 months she just replaced both items this month after how many months will she replace both the light bulb and the air filter? select all that apply

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

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.