Solve the System of Equations by Substitution

question 73

Multiple Choice

Solve the system of equations by substitution.
-5x - 2y = -1 x + 4y = 35

• A)(3, 9)
• B)(2, 8)
• C)(2, 9)
• D)(3, 8)

Identify signs of emotional and psycho-emotional development in children.

Recognize signs, risk factors, and management strategies for child abuse and neglect.

Understand the stages of social and physical development in children.

Recognize common dermatologic and infectious diseases in children and their basic management.

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Definitions:

Double-blind Experiment

A double-blind experiment is a research design in which both the participants and the experimenters are unaware of who is receiving the treatment or control, to prevent bias.

Statistically Significant

A determination that an observed effect is unlikely to have occurred by chance, based on a predetermined significance level.

Dependent Variable

The variable that is the subject’s response to, and dependent on, the level of the manipulated independent variable.

Internal Validity

The extent to which a study accurately demonstrates a cause-effect relationship by controlling for extraneous variables and bias.