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Questions in Grade High-school

[Answered] Which best describes why the United States tried to strengthen democracy on a global scale during the Cold War? A. to achieve cooperation and security B. to protect itself from a Soviet invasion C. to secure its economic future D. to guarantee individuals' personal freedoms

[Answered] The table shows the distances between a star and three celestial objects. Use the conversion factors to rewrite the distances in different, but equivalent, units. \begin{tabular}{|l|l|} \hline Celestial Objects & Distance from the Star \\ \hline object A & 0.000001877 pc \\ \hline object B & 30.06 AU \\ \hline object C & 778.3 million km \\ \hline \end{tabular} Conversion factors: $1 AU =1.5 \times 10^8 km$ 1 light-year $=9.5 \times 10^{12} km$ 1 parsec $=31$ trillion km , or about 3.262 light-years

[Answered] Which equation shows the quadratic formula used correctly to solve $5 x^2+3 x-4=0$ for $x ?$ A. $x=\frac{-3 \pm \sqrt{(3)^2-4(5)(-4)}}{2(5)}$ B. $x=\frac{3 \pm \sqrt{(3)^2+4(5)(-4)}}{2(5)}$ C. $x=\frac{3 \pm \sqrt{(3)^2-4(5)(-4)}}{2(5)}$ D. $x=\frac{-3 \pm \sqrt{(3)^2+4(5)(-4)}}{2(5)}$

[Answered] What is the vertex of the graph of $f(x)=|x-13|+11$? A. $(-11,13)$ B. $(-13,11)$ C. $(11,13)$ D. $(13,11)$

[Answered] Consider the following intermediate chemical equations: [tex] \begin{array}{ll} C(s)+O_2(g) \rightarrow CO_2(g) & \Delta H_1=-393.5 kJ \\ 2 CO(g)+O_2(g) \rightarrow 2 CO_2(g) & \Delta H_2=-566.0 kJ \\ 2 H_2 O(g) \rightarrow 2 H_2(g)+O_2(g) & \Delta H_3=483.6 kJ \end{array} [/tex] The overall chemical equation is [tex]$C ( s )+ H _2 O ( g ) \rightarrow CO ( g )+ H _2(g)$[/tex]. To calculate the final enthalpy of the overall chemical equation, which step must occur? A. Reverse the first equation, and change the sign of the enthalpy. Then, add. B. Reverse the second equation, and change the sign of the enthalpy. Then, add. C. Multiply the first equation by three, and triple the enthalpy. Then, add. D. Divide the third equation by two, and double the enthalpy. Then, add.

[Answered] Using the word parts and context clues, what does reparative mean? Select one of four: A. Re- means "opposite," and -ative means "to erase completely." B. Re- means "backward," and -ative means "to break something."

[Answered] Nina is 10 years younger than Deepak. Deepak is 3 times as old as Nina. Which system of equations can be used to find $d$, Deepak's age, and $n$, Nina's age? $\begin{array}{l} d=n+10 \\ d=3 n \end{array}$ $\begin{array}{l} d=n-10 \\ d=3 n \end{array}$ $\begin{array}{l} d=n+10 \\ n=3 d \end{array}$ $\begin{array}{l} d=n-10 \\ n=3 d \end{array}$

[Answered] The height of a window is 0.6 feet less than 2.5 times its width. If the height of the window is 4.9 feet, which equation can be used to determine $x$, the width of the window? A. $2.5 x+0.6=4.9$ B. $2.5 x-0.6=4.9$ C. $0.6 x+2.5=4.9$ D. $0.6 x-2.5=4.9

[Answered] Consider this system: $\begin{array}{l} 3 x+\frac{1}{2} y=3 \\ 6 x-y=2 \end{array}$ Which of the following operations would eliminate the $x$-terms if the two equations were added together afterward? A. Multiply the first equation by -6. B. Multiply the first equation by -2. C. Multiply the first equation by 2. D. Multiply the first equation by 6.

[Answered] Very short answer questions 1. List the types of heterotrophic nutrition. 2. Define the term 'egestion'. 3. Name the different types of teeth in our mouth. 4. What is the function of throat? 5. Which part of the digestive system receives the waste, undigested food? 6. Define 'food vacuole'.