Maria said the expression - 4n + 5 + 7n – 6 is equivalent to 2n. What error did Maria likely make? What error did Maria likely make? O A. She combined only the coefficients of n. O B. She did not group like terms correctly. She combined only the first two numbers. OC. She multiplied all the numbers instead of adding or subtracting. O D. She did not group like terms correctly. She combined all of the numbers in the expression eve though they are not all coefficients of n.
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
The given expression is-
-4n + 5 + 7n - 6
According to Maria the above expression is equivalent to 2n.
The above expression can be simplified into the following form-
-4n + 5 + 7n - 6 = (-4n + 7n) + (5-6) = 3n - 1
Hence the expression which Maria got was incorrect.
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