Questions in mathematics

Questions in mathematics

📝 Answered - What does the vector represent?

📝 Answered - Simplify the expression, using the rule for order of operations if necessary: $3 \cdot 12-9 \cdot 8=$ $\square$

📝 Answered - Show that one and only one out of n, n + 3, n + 6, or n + 9 is divisible by 4.

📝 Answered - Select the correct answer. Which algebraic expression is equivalent to this expression? [tex]$3(2 x-8)-11 x$[/tex] A. [tex]$-5 x-8$[/tex] B. [tex]$-17 x-24$[/tex] C. [tex]$-5 x-24$[/tex] D. [tex]$-17 x+24$[/tex]

📝 Answered - Select the correct answer. Which equation has no solution? A. $-4(y+7)=2(-2 y-9)-10$ B. $-2(2 y+8)=4 y+5+y$ C. $4(y+9)=-4(y-9)$ D. $3 y+5-7 y=4(-y+1)+5$

📝 Answered - An auto mechanic charges $50 to diagnose a problem and $25 per hour to repair the problem. If [tex]$x$[/tex] represents the total number of hours worked and [tex]$y$[/tex] represents the total charges, which equation represents this situation? [tex]y=25 x+50[/tex] [tex]y=50 x+25[/tex] [tex]y=50 x-25[/tex] [tex]y=25 x-50[/tex]

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

📝 Answered - Find the value of $7426 \times 60+7426 \times 30$.

📝 Answered - Select the irrational numbers. Select all that apply. [tex]$\sqrt{64}$[/tex] [tex]$0.49449444944449 \ldots$[/tex] [tex]$0.4 \overline{9}$[/tex] [tex]$3.4641 \ldots$[/tex] 0.28125 [tex]$0.12345 \ldots$[/tex] 0 -2.8961

📝 Answered - $\log _3 \frac{a}{3}=$