Solve the System of Equations by Substitution

question 126

Multiple Choice

Solve the system of equations by substitution.
-x + y = -7 x - y = 16

• A)(4.5, 11.5)
• B)(4.5, -11.5)
• C)(7, -11.5)
• D)(7, 4.5)

Describe regulatory proteins and their action in muscle contraction.

Explain the effects of exercise and stimulation frequency on muscle contraction strength and type.

Understand the special structures and properties of cardiac and smooth muscle cells.

Understand the different fiber types in muscles and their functional implications.

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Definitions:

Acid Strength

A measure of the propensity of a compound to donate a proton (H+) in an aqueous solution, often quantified by the acid dissociation constant (Ka).

Formic Acid

The simplest carboxylic acid with the chemical formula HCOOH, known for its role in ant stings.

Empirical Formula

The simplest expression of a compound's composition, showing the ratio of elements without structural information.

Elemental Analysis

Elemental analysis is a process by which the composition of chemical substances is determined, identifying the quantity of each element within a compound.