Concept explainers
Goblin Green Paint is made by mixing blue and yellow paint in the ratio 4 to 3. Show and discuss at least four different ways to represent varying quantities of blue and yellow paint that will mix to make Goblin Green Paint. (These can include ways discussed in previous sections.) Discuss which aspects of proportional relationships are easier to see in some ways than in others.
Learn your wayIncludes step-by-step video
Chapter 7 Solutions
Mathematics For Elementary Teachers With Activities
Additional Math Textbook Solutions
Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
Mathematics All Around (6th Edition)
Probability and Statistics for Engineers and Scientists
A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)
Mathematical Ideas (13th Edition) - Standalone book
Calculus for Business, Economics, Life Sciences, and Social Sciences (14th Edition)
- The resistance of a copper wire carrying an electrical current is directly proportional to its length and inversely proportional to its cross-sectional area. A copper wire with a diameter of 0.0126inch has a resistance of 64.9ohms per thousand feet. What length of 0.0201-inch-diameter copper wire will produce a resistance of 33.5ohms?arrow_forwardA piece shown by the shaded portion is to be cut from a square plate 128 millimeters on a side. a. Compute the area of the piece to be cut. Round the answer to the nearest square millimeter. b. After cutting the piece, determine the percentage of the plate that will be wasted.arrow_forwardThe length a spring stretches varies directly with a weight placed at the end of the spring. When Meredith placed a 6-pound cantaloupe on a hanging scale, the spring stretched 2 inches. How far would the spring stretch if the cantaloupe weighed 9 pounds?arrow_forward
- Solve each problem. w is directly proportional to z. If w=-6 when z=2, find w when z=-3.arrow_forwardThe rate of change of an autocatalytic chemical reaction is kQxkx2 where Q is the amount of the original substance, x is the amount of substance formed, and k is a constant of proportionality. Factor the expression.arrow_forwardThe feed of a drill is the depth of material that the drill penetrates in one revolution. The total depth of penetration equals the product of the number of revolutions and the feed. Compute the feed of a drill that cuts to a depth of 3.300 inches while turning 500.0 revolutions.arrow_forward
- Solve each problem. y is directly proportional to x. If y=15 when x=4, find y when x=75.arrow_forwardThe maximum weight M that can be supported by a beam is jointly proportional to its width w and the square of its height h and inversely proportional to its length L. a Write an equation that expresses this proportionality. b Determine the constant of proportionality if a beam 4 in. wide, 6 in. high, and 12 ft long can support a weight of 4800 lb. c If a 10-ft beam made of the same material is 3 in. wide and 10 in. high, what is the maximum weight it can support?arrow_forwardThe speed of a bicycle gear, in revolutions per minute, is inversely proportional to the number of teeth on the gear. Let s represent the speed of the bicycle gear (in rpm), let n represent the number of teeth on the gear, and let k be the constant of proportionality. Write an equation that relates s to n. s = A gear with 56 teeth has a speed of 30 revolutions per minute. Use the equation that relates s to n and the known information to find k. k = What will be the speed of a gear (in rpm) with 48 teeth? rpmarrow_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 University
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,Functions and Change: A Modeling Approach to Coll...AlgebraISBN:9781337111348Author:Bruce Crauder, Benny Evans, Alan NoellPublisher:Cengage Learning