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Chapter 1: Problem 7
Miriam and Betty buy a total of 42 stamps. Miriam bought 6 more stamps than Betty did. How many stamps did Miriam buy? A. 18 B. 24 C. 30 D. 36
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There are four basic types of chemical reactions, as shown in the table below. $$ \begin{array}{|c|c|} \hline \text { Reaction Type } & \text { General Example } \\ \hline \text { Combination } & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} \\\ \hline \text { Decomposition } & \mathrm{C} \rightarrow \mathrm{A}+\mathrm{B} \\\ \hline \text { Single displacement } & \mathrm{A}+\mathrm{BC} \rightarrow \mathrm{B}+\mathrm{AC} \\ \hline \text { Double displacement } & \mathrm{AB}+\mathrm{CD} \rightarrow \mathrm{AC}+\mathrm{BD} \end{array} $$ The balanced chemical equation describing the reaction between hydrogen and fluorine is shown below. $$ \mathrm{H}_2+\mathrm{F}_2 \rightarrow 2 \mathrm{HF} $$ Which of the four basic types of chemical reactions is this? A. combination B. decomposition C. single displacement D. double displacement
Which of the following best illustrates how the “wagon wheel” analogy applies to the U.S. system of government? A. A wagon wheel is one of four wheels needed to stabilize a wagon. B. The hub of a wagon wheel holds in place the spokes, which strengthen the structure of the wheel. C. A wagon wheel’s hub and spokes are made of different materials. D. A wagon wheel is created in several pieces and then assembled.
Select the point on the number line that corresponds to \(|Q-R|-T\). (For this practice test, mark the point with an X.)
An airplane can hold 325 passengers, 30 in first class and the rest in coach. If a first-class ticket costs \(700 and a coach ticket costs \)250, then what is the minimum revenue that the airplane will gross on a flight in which exactly 3 seats remain empty?
Which statement describes the primary purpose of the lst Amendment? A. The 1st Amendment protects the right to bear arms. B. The 1st Amendment increases the government's restriction of individual freedoms, such as the freedom of religion, of speech, and of the press. C. The 1st Amendment protects essential individual freedoms, such as the freedom of religion, of speech, and of the press. D. The 1st Amendment prohibits Congress from making laws.
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