Concept explainers
A dough recipe calls for 3 cups of flour and
a. Solve this problem by setting up an equation in which you set two fractions equal to each other.
b. Interpret the two fractions that you set equal to each other in part (a) in terms of the recipe. Explain why it makes sense to set these two fractions equal to each other.
c. Why does it make sense to cross-multiply the two fractions in part (a)? What is the logic behind the procedure of cross-multiplying?
d. Now solve the problem of how much water to use for 10 cups of flour in a different way, by using the most elementary reasoning you can. Explain your reasoning clearly.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
Mathematics for Elementary Teachers with Activities (5th Edition)
Additional Math Textbook Solutions
Math in Our World
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
Calculus Volume 3
Mathematics with Applications In the Management, Natural and Social Sciences (11th Edition)
Differential Equations: An Introduction to Modern Methods and Applications
Basic College Mathematics (12th Edition)
- A city planner wants to build a bridge across a lake in a park. To find the length of the bridge, he makes a right triangle with one leg and the hypotenuse on land and the bridge as the other leg. The length of the hypotenuse is 340 feet and the leg is 160 feet. Find the length of the bridge.arrow_forwardSuppose you are using envelopes and counters to model solving the equations x+4=12and 4x=12. Explain how you would solve each equation.arrow_forward
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellElementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice UniversityHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill