CarlosCooke2
21.10.2020 •
Mathematics
Which of the following gives a valid reason for using the given solution method to solve the system of equations shown?
Equation I: 4x − 5y = 4
Equation II: 2x + 3y = 2
A. Elimination; a coefficient in Equation I is an integer multiple of a coefficient in Equation II.
B. Elimination; a coefficient in Equation II is an integer multiple of a coefficient in Equation I.
C. Substitution; Equation I can be solved for x in one step by dividing both sides by 4.
D. Substitution; Equation II can be solved for x in one step by subtracting 3y from both sides.
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Ответ:
Ответ:
Sample Response: First, decide what the variable will represent. For example, you might let d represent “days in the marking period”. Next, decide what the constant will represent. For example, 120 could be “120 days”. Use the inequality symbol to determine the relationship between the variable and the constant. An example might be, “There are fewer than 120 days in the marking period.”
Step-by-step explanation: