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Questions in mathematics

[Jawaban] Simplify the equation. [tex]\begin{array}{l} \text { PMT }=$81,000 \times \frac{\left(\frac{0.06}{12}\right)}{\left[\left(1+\frac{0.06}{12}\right)^{(12 \cdot 17)}-1\right]} \\ \text { PMT } =$81,000 \times \frac{(\square)}{[(\square)(\square)}-1\right] \end{array}[/tex] (Round to seven decimal places as needed.)

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] Solve the following word problems. a) A farmer produces 285 bags of wheat, 236 bags of pulses, and 409 bags of rice. Find the total number of bags of grains.

[Jawaban] The scores on a national achievement test are normally distributed with a mean of 500 and a standard deviation of 100. What percentage of those who took the test had a score greater than 630?

[Jawaban] The resting heart rates for a sample of 15 students are recorded in the following stemplot. Heart Rates \begin{tabular}{l|lllll} 5 & 5 & & & & \\ 6 & 3 & & & & \\ 6 & 5 & 9 & 9 & 9 & 9 \\ 7 & 0 & 1 & 3 & 3 & 4 \\ 7 & 5 & 6 & 7 & & \end{tabular} What is the mean resting heart rate for this sample? A. 66.0 beats per minute B. 69.0 beats per minute C. 69.9 beats per minute D. 70.0 beats per minute Key: [tex]7 \mid 5=75[/tex] beats per minute

[Jawaban] Without actually calculating cubes, find the value of $(28)^3+(-15)^3+(-13)^3$

[Jawaban] If [tex]f(x)=5 x+4[/tex], which of the following is the inverse of [tex]f(x)[/tex]? A. [tex]f^{-1}(x)=4-5 x[/tex] B. [tex]f^{-1}(x)=\frac{x-4}{5}[/tex] C. [tex]f^{-1}(x)=5 x-4[/tex] D. [tex]f^{-1}(x)=\frac{x-5}{4}[/tex]

[Jawaban] Subtract these polynomials. $\left(2 x^2+2 x+3\right)-\left(x^2+2 x+1\right)=$ A. $x^2+4 x+2$ B. $x^2+4 x+4$ C. $x^2+4$ D. $x^2+2$

[Jawaban] For what value of [tex]$x$[/tex] is [tex]$\frac{3 x+2}{2 x+1}$[/tex] undefined? A. [tex]$\frac{1}{2}$[/tex] B. [tex]$-\frac{1}{2}$[/tex] C. [tex]$-\frac{2}{3}$[/tex] D. [tex]$\frac{2}{3}$[/tex]

[Jawaban] Which of the following could not be points on the unit circle? A. $\left(\frac{\sqrt{3}}{2}, \frac{1}{3}\right)$ B. $\left(-\frac{2}{3}, \frac{\sqrt{5}}{3}\right)$ C. $(0.8,-0.6)$ D. $(1,1)$