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29 April, 01:55

Four times a number decreased by seven

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  1. 29 April, 01:57
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    In order to answer this question, we must break this mathematical expression up into a series of mathematical operations (exponent, multiplication, division, addition, and/or subtraction):

    "4 times a number" - The word "times" implies that we have to multiply 4 by an unknown number. We can simply label this unknown number as x.

    "cubed" - In order to "cube" a number, we must raise it to the third power, or have an exponent of 3. Our unknown number of x now becomes x3 because we raised it to the third power.

    "decreased by 7" - The word "decreased" implies that we must subtract 7 from the product of 4 multiplied by x3

    With all of the information we now have, we can form an algebraic expression for this problem.

    "4 times a number cubed decreased by 3" now becomes:

    4x3 - 7
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