Questions in mathematics

Questions in mathematics

📝 Answered - Simplify $-2xy + 3x - 2xy + 3x$ A) $-4xy + 6x$ B) $4xy + 6x$ C) $4xy - 6x$ D) $2xy$

📝 Answered - Simplify $-\sqrt{-48}$. A) $4 \sqrt{3} i$ B) $-4 \sqrt{3}$ C) $-4 \sqrt{3} i$ D) $4 \sqrt{3}$

📝 Answered - Solve the equation. [tex]$\begin{array}{c} 500 \cdot 2^{0.07 x}=1000 \\ x=[?]\\ \end{array}$[/tex]

📝 Answered - Which values of $x$ and $y$ would make the following expression represent a real number? $(4+5i)(x+yi)$ A. $x=-4, y=0$ B. $x=4, y=-5$ C. $x=0, y=5$

📝 Answered - The axis of symmetry for a quadratic equation can be found using the formula [tex]$x=\frac{-b}{2 a}$[/tex], where [tex]$a$[/tex] and [tex]$b$[/tex] are coefficients in the quadratic equation and [tex]$x$[/tex] represents the values along a vertical line on the coordinate plane. What is the equation when solved for [tex]$a$[/tex]? A. [tex]$a=\frac{b}{2 x}$[/tex] B. [tex]$a=\frac{-b}{2 x}$[/tex] C. [tex]$a=\frac{1}{2} b x$[/tex] D. [tex]$a=-\frac{1}{2} b x$[/tex]

📝 Answered - A cost function, [tex]C(x)[/tex], is given below. Find the average cost per item when the required number of items are produced. [tex]C(x)=20 x+1500,100[/tex] items What is the average cost per item?

📝 Answered - Consider the following equation: [tex]$4 x-4 y=8$[/tex] Step 1 of 2: Determine the missing coordinate in the ordered pair (4, ?) so that it will satisfy the given equation.

📝 Answered - If the sum of Rs. 2400 grows by 1/5 of itself every year, in how many years and months will it amount to Rs. 3240?

📝 Answered - Renata wins a $20 gift card to an online music site. After Renata purchases 16 songs, the gift balance is $0. Which equation represents the relationship between $y$, the remaining balance, and $x$, the number of songs purchased? $4 x+5 y=-100$ $5 x+4 y=80$ $4 x+5 y=16$ $5 x+4 y=20$

📝 Answered - For what value of $x$ does $4^x=\left(\frac{1}{8}\right)^{x+5}$?