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Questions in Grade College

[Free] Which of the following equations is not balanced? [tex]2 Al +6 HCl \rightarrow 2 AlCl _3+3 H _2[/tex] [tex]2 Na +2 H _2 O \rightarrow 2 NaOH + H _2[/tex] [tex]SO _2+ O _2 \rightarrow SO _3[/tex] [tex]C _3 H _8+5 O _2 \rightarrow 3 CO _2+4 H _2 O[/tex] [tex]2 H _2+ O _2 \rightarrow 2 H _2 O[/tex]

[Free] Which is NOT a result of a weak textbase? A. The reader has difficulty making inferences. B. The reader has access to little information that can be integrated with related schema. C. The reader has difficulty identifying differences between characters. D. The reader has problems with recalling information from the text.

[Free] Multiply. Simplify if possible. [tex]\frac{14 x}{2} \cdot \frac{x^7}{7 x^5}[/tex]

[Free] Solve the following system of equations by the substitution method. Check the solutions. [tex]\left\{\begin{aligned} 25 x^2+9 y^2 & =225 \\ 5 x+3 y & =15 \end{aligned}\right.[/tex] Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is { }. (Type an ordered pair. Use a comma to separate answers as needed.) B. There is no solution.

[Free] Which type of retirement plan promises to pay you a specific (i.e. "defined") monthly benefit when you retire? A. traditional 401(k) B. 403(b) C. pension D. Roth IRA

[Free] The function $f(r)$ gives the area of a circle with radius $r$. It can be written in equation form as $f(r)=3.14 r^2$. What is $f(3)$? A. 12.14 B. 18.84 C. 28.26 D. 88.74

[Free] Solve the equation using the quadratic formula. [tex]4 x^2-x=-2[/tex]. The solution set is (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)

[Free] Simplify. $\sqrt{147}$ A. $21 \sqrt{7}$ B. $49 \sqrt{3}$ C. $7 \sqrt{3}$ D. $3 \sqrt{7}$

[Free] Which of the following is NOT an example of an affiliation behavior? A. talking in short phrases B. warm vocal tones C. head nods

[Free] Solve the hyperbolic equation: 2cosh 2x +10sinh2x=5