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Questions in Grade College

[Jawaban] If $\lambda x^2-10 x y+12 y^2+5 x-16 y-3=0$ represents a pair of straight lines, the value of $\lambda$ is: a) -1 b) -3 c) -3 d) -7

[Jawaban] Fill in the blank with the correct inequality symbol. State which property of inequalities is being utilized. If [tex]\frac{1}{5} x \leq 2[/tex], then [tex]x[/tex] [ ] 10. Which of the following properties is being utilized? A. Multiplication Property B. Addition Property

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] Which of the following is not a safety measure when working with mechanical motion? A. Allow time for motion to stop B. Use blocking devices to prevent movement C. Wear cut-resistant gloves D. Keep clothing and body clear of area

[Jawaban] $\left{\begin{array}{l} 9 x-y=15 \ 2 x+8 y=28 \end{array}\right. Raj's Work $\begin{array}{rlrl} 9 x-y & =15 & 2 x+8(15+9 x) & =28 \ -y & =15-9 x & 2 x+120+72 x & =28 \ y & =-15+9 x & 74 x+120 & =28 \ & 74 x & =-92 \ & x & =-\frac{46}{37} \end{array}$ 1 2 3 4 5 $\begin{aligned} 9\left(-\frac{46}{37}\right)-y & =15 \ -\frac{414}{37}-y & =15 \ y & =-\frac{969}{37} \end{aligned}$ What error did Raj make? A. Raj forgot to multiply the value of $x$ by 9 when solving for the value of $y$. B. Raj subtracted 120 from both sides when he solved for the value of $x$. C. Raj forgot the negative sign when substituting $-15+9 x$ for $y$. D. Raj found the value of $-y$ instead of $y$.

[Jawaban] What is the formula for iron(III) fluoride? A. FeF B. $Fe _3 F_3$ C. $FeF _3$ D. FesF

[Jawaban] Select the correct answer. The sum of two consecutive numbers is 157. This equation, where [tex]$n$[/tex] is the first number, represents the situation: [tex]$2n + 1 = 157$[/tex]. What is the first number? A. 77 B. 78 C. 79 D. 80

[Jawaban] True or False? Plenty of people buy "back belts", but that doesn't necessarily mean that they protect your back from injury.

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] All of the following are characteristics of a good objective EXCEPT: A. profitable B. realistic C. measurable D. time specific E. consistent