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They must have compatible units of measure.
For example, you cannot directly add a quantity measured in meters to a quantity measured in centimeters. If their units of measure are compatible but not identical, one can be converted to the other.
On the other hand, there is no way to add a quantity in feet to a quantity in pounds, as those are incompatible units of measure.
Additionally, if the quantities are fractions, they must also have the same denominators, also called sharing a common denominator.
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How do you write an expression in quadratic form?
Write an expression consisting of up to three terms:One term in which the key variable is squared,one term with a multiple of the variable, anda constant.The first of these MUST be present. The three terms must be added or subtracted.
What is the least number that should be subtracted from 832 to make it exactly divisible by 49?
The answer is 48illustration:833 is a multiple of 49 which is more than 832the multiple which is immediately less than 833 is 784so the difference that must be subtracted is 832- 784 = 48
When subtracting variables with exponents do you add or subtract the exponenets?
You cannot ad or subtract variables with different exponents: the exponents must be the same. The coefficients are added or subtracted and the exponent of the answer is the common exponent. (The rules are similar to those for the denominators of fractions.)Thus 2x^2 + 5x^3 cannot be combined into a single term.while 2x^2 + 5x^2 = (2+5)*x^2 = 7x^2
What number must be added to the polynomial to complete the perfect square x2-24x?
144
What must be added to 3x-7 to make x2 4x -1?
x2 + x + 6
