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Questions in Grade College

📝 Answered - What does it mean to say that a data point has a residual of 1? A. The point lies 1 unit below the regression line. B. The point lies 1 unit above the regression line. C. The point lies directly on the regression line. D. The x-coordinate of the point is 1.

📝 Answered - Indicate which are valid expressions. $x$ and $y$ are variables. 1) $x+1$ Valid Not valid 2) 2 * $(x-y)$ Valid Not valid 3) $x$ Valid Not valid 4) 2 Valid Not valid 5) $2 x$ Valid Not valid 6) $2+(x y)$ Valid Not valid 7) $y=x+1$ Valid

📝 Answered - Which statements are true about the graph of [tex]$y \leq 3 x+1$[/tex] and [tex]$y \geq-x+2$[/tex]? Check all that apply. A. The slope of one boundary line is 2. B. Both boundary lines are solid. C. A solution to the system is [tex]$(1,3)$[/tex]. D. Both inequalities are shaded below the boundary lines. E. The boundary lines intersect.

📝 Answered - Select the correct answer. The dimensions and number of animals are given for different corrals. | Corral | Length | Width | Number of Animals | | :----- | :---------- | :---------- | :---------------- | | 1 | 50 meters | 40 meters | 110 | | 2 | 60 meters | 35 meters | 115 | | 3 | 55 meters | 45 meters | 125 | | 4 | 65 meters | 40 meters | 130 | The population constraints state that each corral should have at least 20 square meters for each animal. Which corral meets this requirement? A. Corral 1 B. Corral 2 C. Corral 3 D. Corral 4

📝 Answered - Read and the products with a suitable coefficient. equation by multiplying the reactants The chemical reaction which occurs by the absorption of heat from the surroundings is called an endothermic reaction. The chemical reaction in which heat is released to the surroundings is called exothermic reaction. Test Your Concept Tick $(\sqrt{ })$ the correct alternative (MCQs); a. What is the type of change in which new substances with different properties are formed? A) physical B) chemical C) reversible D) both A) and B) b. What are the substances that take part in a chemical reaction called? A) products B) solution C) reactants D) mixture C. Which one of the following is the example of a chemical reaction? A) melting of ice B) rusting of iron C) making a salt solution D) magnetizing an iron nail d. Which one of the following chemical reactions is an endothermic reaction? A) $C + O _2 \longrightarrow CO _2$ B) $N _2+ O _2 \rightarrow 2 NO$ C) $Zn +2 HCl \longrightarrow ZnCl _2+ H _2$ D) $CaO + H _2 O \longrightarrow Ca ( OH )_2$ - Short answer type questions:

📝 Answered - Brett's teacher observed Brett's behavior in class for a week and compared the minutes he stayed on task in class to the grade he earned on the homework that night. She found that the correlation coefficient was [tex]$r=0.97$[/tex]. What type of relationship has his teacher discovered? A. positive correlation, likely causal B. positive correlation, not likely causal C. negative correlation, likely causal D. negative correlation, not likely causal

📝 Answered - What is the purpose of random assignment in an experiment? A. To reduce bias and increase validity B. To ensure everyone gets the same treatment C. To improve survey response rate D. To group similar individuals

📝 Answered - Solve the following system of equations: [tex] \begin{array}{l} 3 x-y=11 \\ 4 x+5 y=2 \end{array} [/tex]

📝 Answered - Which term referred to the idea among nineteenth-century Americans that the United States would inevitably expand westward across the continent, spreading civilization and democracy to a large part of the globe in the process? A. Manifest Destiny B. The American System C. Era of Good Feelings D. Popular Sovereignty

📝 Answered - Complete the table below for the equation [tex]y=-x+2[/tex]. Then use two of the ordered pairs to graph the equation. | x | | y | |---|---|---| | -2| 4 | (-2,4)| | -1| -1| (-1,3)| | 0 | 2 | (0,2)| | 1 | 1 | (1,1)| | 2 | 0 | (2,0)