Questions in mathematics

Questions in mathematics

📝 Answered - Simplify this expression. [tex]12 x^2(3 x^4-2 x)[/tex] A. [tex]36 x^6-2 x[/tex] B. [tex]36 x^6-24 x^3[/tex] C. [tex]36 x^8-2 x[/tex] D. [tex]36 x^8-24 x^3[/tex]

📝 Answered - What is the $y$-coordinate of the point that divides the directed line segment from J to K into a ratio of $5: 1$? $v=\left(\frac{m}{m+n}\right)\left(v_2-v_1\right)+v_1$ -8 -5 0 6

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

📝 Answered - Which equation represents the following word problem? A school sells pencils to students for 25 cents each. If a student has $9, how many pencils can the student buy? $(.25) p=9$ $\frac{p}{.25}=9$ $p-.25=9$ $p+.25=9$

📝 Answered - Choose the polynomial written in standard form. [tex]x^4+4 x^3+10 x^2[/tex] [tex]x+4 x^4+10 x^2[/tex] [tex]x^4+4 x+10 x^2[/tex] [tex]x^6+4 x^3+10 x^7[/tex]

📝 Answered - What are the solutions of the equation [tex]$x^4+95 x^2-500=0$[/tex]? Use factoring to solve. A. [tex]$x= \pm \sqrt{5}$[/tex] and [tex]$x= \pm 10$[/tex] B. [tex]$x= \pm i \sqrt{5}$[/tex] and [tex]$x= \pm 10 i$[/tex] C. [tex]$x= \pm \sqrt{5}$[/tex] and [tex]$x= \pm 10 i$[/tex] D. [tex]$x= \pm i \sqrt{5}$[/tex] and [tex]$x= \pm 10$[/tex]

📝 Answered - By rounding to 1 significant figure, estimate the answers to these questions: a) $76 \times 23$ b) $297 \times 589$ c) $715 \times 283$

📝 Answered - Emily has the following regular test scores in her economics class: 83, 91, 66, 89, 85. On her final exam, she scored a 97. When determining students' final averages, the professor drops the lowest regular test score, and then counts the remaining regular tests as 50% of the total average. What will Emily's final average be?

📝 Answered - If [tex]$y=3 t^{\prime 3}+[/tex], then find [tex]$\frac{d y}{d t}$[/tex]

📝 Answered - 25. [tex]\sin (A+B) \sin (A-B)=[/tex] a. [tex]\sin ^2 A-\sin ^2 B[/tex] b. [tex]\cos ^2 B-\cos ^2 A[/tex] c. both a and b d. None of them