Questions in mathematics

Questions in mathematics

📝 Answered - How many solutions does this linear system have? [tex] \begin{array}{l} y=2 x-5 \ -8 x-4 y=-20 \end{array} [/tex] A. one solution: (-2.5,0) B. one solution: (2.5,0) C. no solution D. infinite number of solutions

📝 Answered - If [tex]log _{10} 8=0.9031[/tex], find...

📝 Answered - The equations in the system below are parallel. [tex] \begin{array}{l} y=3 x+5 \\ y=3 x+8 \end{array} [/tex] How many solutions does the system have? A. no solution B. one unique solution C. two solutions D. an infinite number of solutions

📝 Answered - [tex]\frac{11}{4 x^2 y^3} \div \frac{1}{4}[/tex]

📝 Answered - $5.14 \div 5-12 \frac{1}{2}

📝 Answered - Which shows the correct substitution of the values $a, b$, and $c$ from the equation $-2=-x+x^2-4$ into the quadratic formula? Quadratic formula: $x=\frac{-b \pm \sqrt{b^2-4 a c}}{2 a}$ A. $x=\frac{-(-1) \pm \sqrt{(-1)^2-4(1)(-4)}}{2(1)}$ B. $x=\frac{-1 \pm \sqrt{1^2-4(-1)(-4)}}{2(-1)}$ C. $x=\frac{-1 \pm \sqrt{(1)^2-4(-1)(-2)}}{2(-1)}$ D. $x=\frac{-(-1) \pm \sqrt{(-1)^2-4(1)(-2)}}{2(1)}$

📝 Answered - What is the solution of [tex]log _x 729=3[/tex]? A. 6 B. 9 C. 18 D. 81

📝 Answered - Which expression is equal to $53462 \div 14$? A. $3810 \times 14+12$ B. $3818 \times 14+10$ C. $3810 \times 14 \times 12$ D. $3818 \times 14 \times 10$

📝 Answered - Use the compound-interest formula to find the account balance [tex]$A$[/tex], where [tex]$P$[/tex] is principal, [tex]$r$[/tex] is interest rate, [tex]$n$[/tex] is the number of compounding periods per year, [tex]$t$[/tex] is time in years, and [tex]$A$[/tex] is the account balance.

📝 Answered - Solve the following equation algebraically: [tex]x^2=36[/tex] A. [tex]x= \pm 18[/tex] B. [tex]x= \pm 6[/tex] C. [tex]x=-6[/tex] D. [tex]x=-18[/tex]