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Questions in mathematics

[Free] The equation $\cos ^{-1}\left(\frac{3.4}{10}\right)=x$ can be used to determine the measure of angle BAC. What is the degree measure of angle BAC? Round to the nearest whole degree.

[Free] $8 \frac{1}{4}+2 \frac{1}{2}=$

[Free] The initial tableau of a linear programming problem is given. Use the simplex method to solve the problem. [tex] \left[\begin{array}{rrrrrrr}x_1 & x_2 & s_1 & s_2 & s_3 & z & \\ 1 & 2 & 1 & 0 & 0 & 0 & 14 \\ 4 & 1 & 0 & 1 & 0 & 0 & 32 \\ 1 & 1 & 0 & 0 & 1 & 0 & 4 \\ \hline-4 & -3 & 0 & 0 & 0 & 1 & 0\end{array}\right] [/tex] The maximum is $\square$ when [tex]$x _1=$[/tex] $\square$ , [tex]$x_2=$[/tex] $\square$ , [tex]$s _1=$[/tex] $\square$ , [tex]$s _2=$[/tex] $\square$ , and [tex]$s _3=$[/tex] $\square$. (Type integers or simplified fractions.)

[Free] Given the function below, fill in the table of values and use the table values to graph. [tex]y=3 x[/tex] | x | y=3x | |---|---| | -3 | | | -2 | | | -1 | | | 0 | | | 1 | | | 2 | | | 3 | |

[Free] Use the distributive property to solve the following: (a) [tex]$650 \times 267$[/tex] (b) [tex]$7,634 \times 123-7,634 \times 3$[/tex] (c) [tex]$456 \times 230$[/tex] (d) [tex]$625 \times 3+2 \times 25 \times 18$[/tex] (e) [tex]$34,645 \times 309-34,645 \times 9$[/tex]

[Free] Which equation represents a linear function? [tex]y(x-1)=9[/tex] [tex]y-5=x(-x+2)[/tex] [tex]y(y-1)=x+25[/tex] [tex]y-5=x-20[/tex]

[Free] The density of a fish tank is $0.3 \frac{\text { fish }}{\text { feet }^3}$. There are 15 fish in the tank. What is the volume of the tank? A. $5 ft ^3$ B. $45 ft ^3$ C. $50 ft ^3$ D. $90 ft ^3$

[Free] A line segment has endpoints at $(-4,-6)$ and $(-6,4)$. Which reflection will produce an image with endpoints at $(4,-6)$ and $(6,4)? A. a reflection of the line segment across the $x$-axis B. a reflection of the line segment across the $y$-axis C. a reflection of the line segment across the line $y=x$ D. a reflection of the line segment across the line $y=-x

[Free] Find the value of the expression: [tex]$10^{15} \div 10^{12}$[/tex]

[Free] Compute: $-3 \cdot 2^5$