To solve an indirect proportion math problem, identify the two given proportions. Next, multiply the increasing quantity and decreasing quantity of the known proportion to find the constant. Use the constant in the indirect proportion equation to solve for the unknown value.
Know MoreIf given a problem asks how many hours it takes five people to paint a house if it previously took eight people 17 hours, determine which value increases when the other decreases. In this problem, when the number of people increases, the time decreases.
The formula to determine the constant is x * y = k. Since the time it takes to paint the house with five people is the unknown, time is assigned to the y variable, and the number of people is assigned to x. Therefore, the constant is 136.
The formula to solve an indirect proportion is y = (k / x). K is the constant, y is the unknown value and x is the known value. For example, if the constant is 136 and x equals five, the equation is (136 / 5) = 27.2. Therefore, painting the house takes 27.2 hours with five people.
A net change in math is the total of all of the changes completed throughout the solving of a problem. The net change is reflected in a numerical amount and can be positive, negative or at zero.
Full Answer >In math, the mean is the average of a set of numbers. To determine the mean, add all numbers in a set and take this answer and divide it by how many numbers are in the set.
Full Answer >The numbers to add in an addition problem are called addends, summands or terms, while the answer to the problem is the sum. In the number sentence a+b=c, a and b are addends, while c is the sum.
Full Answer >Regrouping is the borrowing of a value from one column of numbers to another to aid a mathematical operation. If one is subtracting, it’s necessary to regroup when the number at the top of a column is smaller than the one below it.
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