Slow Food Movement

Algebra Level 4

It takes me 45 minutes to make dinner. If my four-year-old daughter "helps" me, it takes 60 minutes. Suppose my wife takes 30 minutes to make dinner by herself. How many minutes will it take her if our daughter "helps" her?

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100 Day Summer Challenge

Slow Food Movement

Image Credit: Flickr Anais Watterson.

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Courses

Topics

Community

100 Day Summer Challenge

Slow Food Movement

Image Credit: Flickr Anais Watterson.

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.