Questions in mathematics

Questions in mathematics

[Free] Select the correct answer. Paula used these steps to solve an equation: Step 1: $-4(x+8)-2 x=25$ Step 2: $-4 x-32-2 x=25$ Step 3: $-6 x-32=25$ Step 4: $-6 x=57$ Step 5: $x=-9 \frac{1}{2}$ Between which two steps did Paula use the division property of equality? A. steps 1 and 2 B. steps 2 and 3 C. steps 3 and 4 D. steps 4 and 5

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

[Free] If [tex]$f(x)=\frac{1}{9} x-2$[/tex], what is [tex]$f^{-1}(x)$[/tex]? A. [tex]$f^{-1}(x)=9 x+18$[/tex] B. [tex]$f^{-1}(x)=\frac{1}{9} x+2$[/tex] C. [tex]$f^{-1}(x)=9 x+2$[/tex] D. [tex]$f^{-1}(x)=-2 x+\frac{1}{9}$[/tex]

[Free] Find the product \(\frac{8}{6 n-4} \cdot\left(9 n^2-4\right)\). An expression can be written in rational form by writing it as a fraction with a denominator of what?

[Free] Let the sample space be S = {1, 2, 3, 4, 5, 6}. Suppose the outcomes are equally likely. Compute the probability of the event E equals an odd number.

[Free] What is $g^2-36$ in factored form?

[Free] Does the element [tex]$p=60$[/tex] belong to the set [tex]$\lbrace p \mid p=3x, 0 \leq x \leq 21, x \in W\rbrace$[/tex]? True False

[Free] The depth of snow after $n$ hours of a snowstorm is represented by the function $f(n+1)=f(n)+0.8$ where $f(0)=2.5$. Which statement describes the sequence of numbers generated by the function? A. The depth of snow was 0.8 inches when the storm began, and 2.5 inches after the first hour of the storm. B. The depth of snow was 1.7 inches when the storm began, and 0.8 inches of snow fell each hour. C. The depth of snow was 2.5 inches when the storm began, and increased by 0.8 inches each hour. D. The depth of snow was 3.3 inches when the storm began, and 2.5 inches of snow fell in 1 hour.

[Free] What is $5,900,000$ in scientific notation? A. $5.9 \times 10^{-5}$ B. $5.9 \times 10^7$ C. $5.9 \times 10^{-6}$ D. $5.9 \times 10^6$

[Free] Which recursive formula can be used to generate the sequence shown, where [tex]f(1)=9.6[/tex] and [tex]n \geq 1[/tex]? [tex]9.6,-4.8,2.4,-12,0.6, \ldots[/tex] A. [tex]f(n+1)=(-0.5) f(n)[/tex] B. [tex]f(n+1)=(0.5) f(n)[/tex] C. [tex]f(n+1)=f(0.5 n)[/tex] D. [tex]f(n+1)=f(-0.5 n)[/tex]