Questions in mathematics

Questions in mathematics

📝 Answered - If [tex]k(x)=5 x-6[/tex], which expression is equivalent to [tex](k+k)(4)[/tex]? A. [tex]5(4+4)-6[/tex] B. [tex]5(5(4)-6)-6[/tex] C. [tex]54-6+54-6[/tex] D. [tex]5(4)-6+5(4)-6[/tex]

📝 Answered - Write the following rational numbers in decimal form. (1) [tex]$\frac{9}{37}$[/tex] (2) [tex]$\frac{18}{42}$[/tex] (3) [tex]$\frac{9}{14}$[/tex] (4) [tex]$\frac{-103}{5}$[/tex] (5) [tex]$-\frac{11}{13}$[/tex]

📝 Answered - The aging year has 50 teachers. $\begin{array}{cccccccccc} 21 & 37 & 49 & 27 & 49 & 42 & 26 & 33 & 46 & 40 \ 50 & 29 & 23 & 24 & 29 & 31 & 36 & 22 & 27 & 38 \ 31 & 26 & 42 & 39 & 34 & 23 & 21 & 32 & 41 & 46 \ 46 & 21 & 33 & 29 & 28 & 43 & 47 & 40 & 34 & 44 \ 26 & 38 & 34 & 49 & 45 & 27 & 25 & 33 & 39 & 40 \end{array}$ a. Form a frequency distribution table partly done using the interval of 21-25, 26-30, 31-35... b. Calculate the mode, mean, and median. c. Calculate the variance and standard deviation.

📝 Answered - Fill in the gap to factorise this expression [tex]$10 x+15=-(2 x+3)$[/tex]

📝 Answered - Solve for $k$. $8 k+2 m=3 m+k$

📝 Answered - Express $\sqrt{\frac{19}{20}}$ as a decimal.

📝 Answered - The formula $P=2l+2w$ means that the perimeter of a rectangle is equal to twice the sum of its length and its width. Solve $P=2l+2w$ for $w$. A. $w=P-2-l$ B. $w=\frac{P-2 l}{2}$ C. $w=\frac{P-2 l}{2}$ D. $w=\frac{P-2}{l}

📝 Answered - What is the equation of the quadratic function with a vertex at $(2,-25)$ and an $x$-intercept at $(7,0)$? A. $f(x)=(x-2)(x-7)$ B. $f(x)=(x+2)(x+7)$ C. $f(x)=(x-3)(x+7)$ D. $f(x)=(x+3)(x-7)$

📝 Answered - What are the potential solutions of log4 x+log4 (x+6)=2

📝 Answered - Calculate the value of x using the sine rule. 12 cm 7 cm x°