Questions in mathematics

Questions in mathematics

📝 Answered - Evaluate the expression below when [tex]x=-4[/tex]. [tex]4 x^2-2 x \times 15[/tex] A. -56 B. 184 C. 376 D. 1,080

📝 Answered - If an image of a triangle is congruent to the pre-image, what is the scale factor of the dilation? A. 0.1 B. [tex]$\frac{1}{2}$[/tex] C. 1 D. 10

📝 Answered - Adele is 5 years older than Timothy. In three years, Timothy will be $\frac{2}{3}$ of Adele's age. What is Adele's current age?

📝 Answered - Consider the following system of equations. [tex]\begin{aligned} -2 x+5 y & =19 \\ y & =-\frac{5}{6} x-\frac{1}{6} \end{aligned}[/tex] Use this graph of the system to approximate its solution. A. [tex]\left(\frac{5}{2},-\frac{13}{4}\right)[/tex] B. [tex]\left(-\frac{13}{4}, \frac{5}{2}\right)[/tex] C. [tex]\left(\frac{13}{4},-\frac{5}{2}\right)[/tex] D. [tex]\left(-\frac{5}{2}, \frac{13}{4}\right)[/tex]

📝 Answered - de 2.2 [tex]\frac{4}{3} \div 1 \frac{3}{4}=[/tex] de 3.4 [tex]\frac{3}{6} \div 2 \frac{1}{2}=[/tex] in 1.2 [tex]\frac{1}{4} \div 3 \frac{4}{5}=[/tex] i. 5. [tex]\frac{3}{6} \div 2 \frac{1}{2}=[/tex] i. 6. [tex]\frac{1}{3} \div 1 \frac{3}{6}=[/tex] i. 7 [tex]\frac{2}{4} \div 2 \frac{1}{3}=[/tex]

📝 Answered - The height, [tex]$h$[/tex], in feet of the tip of the hour hand of a wall clock varies from 9 feet to 10 feet. Which of the following equations can be used to model the height as a function of time, [tex]$t$[/tex], in hours? Assume that the time at [tex]$t=0$[/tex] is 12:00 a.m. [tex]$h=0.5 \cos \left(\frac{\pi}{12} t\right)+9.5$[/tex] [tex]$h=0.5 \cos \left(\frac{\pi}{6} t\right)+9.5$[/tex] [tex]$h=\cos \left(\frac{\pi}{12} t\right)+\theta$[/tex] [tex]$h=\cos \left(\frac{\pi}{6} t\right)+\theta$[/tex]

📝 Answered - Select the best answer for the question. What is $4^3$ in expanded form? A. $3 \times 3 \times 3 \times 3$ B. $12 \times 12 \times 12$ C. $4 \times 4 \times 4$ D. $8 \times 8$

📝 Answered - Factor the trinomial completely: [tex]$-16 h^3+80 h^2 y-100 h y^2$[/tex]

📝 Answered - Consider the graph of the linear function [tex]$h(x)=-6+\frac{2}{3} x$[/tex]. Which quadrant will the graph not go through? A. Quadrant I, because the slope is negative and the [tex]$y$[/tex]-intercept is positive B. Quadrant II, because the slope is positive and the [tex]$y$[/tex]-intercept is negative C. Quadrant III, because the slope is negative and the [tex]$y$[/tex]-intercept is positive D. Quadrant IV, because the slope is positive and the [tex]$y$[/tex]-intercept is negative

📝 Answered - Logan has two tubs of beads. 5% of the 600 beads in Tub A are yellow. 4% of the 900 beads in Tub B are yellow. Work out the total number of yellow beads in the tubs?