Questions in mathematics

Questions in mathematics

[Free] (i) \frac{7}{8} - \frac{5}{9} + \frac{-11}{36} (ii) \frac{-9}{4} - \frac{8}{3} + \frac{1}{2} - 3

[Free] II. Direction: Relations Expressed as Mappings Express the following relations as a mapping, state the domain and range, then determine if it is a function. 6. {(-2,-1), (0,3), (5,4), (-2,3)} Domain: Range: Function: 7. {(-1,5), (0,3), (2,3), (3,1)} Domain: Range: Function:

[Free] (b) Without using a calculator, evaluate $54^2-44^2$.

[Free] Which term gives the number of cycles of a periodic function that occur in one horizontal unit? A. vertical shift B. period C. frequency D. phase shift

[Free] Selma deposited a paycheck for $378.42. She'll use the check register to record her transaction. What is the new balance? $2,257.99

[Free] A pharmacist has 80 milliliters of a $25 \%$ saline solution. Which expression can be used to find the percentage concentration of the final solution if she adds $x$ milliliters of a $10 \%$ saline solution? $y=\frac{0.25(80)+0.1 x}{x} \cdot 100$ $y=\frac{0.25(80)+0.1 x}{80} \cdot 100$ $y=\frac{0.25(80)+0.1 x}{80+0.1 x} \cdot 100$ $y=\frac{0.25(80)+0.1 x}{80+x} \cdot 100$

[Free] Solve this equation: [tex]3 x-\frac{1}{5}-\frac{2}{9} x=\frac{124}{5}[/tex] Step 1: Simplify by combining like terms. Which terms can [tex]3 x-\frac{1}{5}-\frac{2}{9} x=\frac{124}{5}[/tex] be combined?

[Free] A circle has a diameter of 20 inches. Find the area of the sector with the following central angles: 55°, 20°, 62°.

[Free] Solve for $g$. $\frac{g+5.23}{-2}=-0.21$

[Free] Determine an equation of the line tangent to the curve [tex]y=\sqrt{x-8}[/tex] at the point with x-coordinate 9. A. [tex]-x+2 y+7=0[/tex] B. [tex]x-2 y+8=0[/tex] C. [tex]x-2 y+7=0[/tex] D. [tex]-x+2 y+8=0[/tex]