Solve, Using the Substitution Method, and Check $\begin{array} { c } 3 x + 4 y = 63 \\x = y\end{array}$

question 91

Multiple Choice

Solve, using the substitution method, and check. $\begin{array} { c } 3 x + 4 y = 63 \\x = y\end{array}$

• A) (-63, -63)
• B) (10, 10)
• C) (14, 9)
• D) (6, 6)
• E) (9, 9)

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Definitions:

Standard Deviation

A metric that represents the extent of variability or spread within a group of numbers, demonstrating how far apart the values are from their mean.

Sample Observations

Specific instances from a larger population used to gather data and draw conclusions.

Probability

A measure of the likelihood that an event will occur, quantified as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.

Sample Mean

The average value computed from a sample of data, representing an estimate of the population mean.