HRS - Ask. Learn. Share Knowledge. Logo

Questions in mathematics

[Done] Solve each of the quadratic equations. $3 x=0.5 x^2$

[Done] Select all the correct answers. Which functions have a range of [tex]$\left\{y \in R \mid-\infty\ \textless \ y\ \textless \ \infty\right\}$[/tex] ? [tex]$f(x)=-(x+1)^2-4$[/tex] [tex]$f(x)=x^2+7 x-9$[/tex] [tex]$f(x)=-4 x+11$[/tex] [tex]$f(x)=2^{x+3}$[/tex] [tex]$f(x)=\frac{2}{3} x-8$[/tex]

[Done] Simplify: $\frac{3}{x-1}+\frac{2}{x+2}$ Leave denominator in factored form.

[Done] a) $3 x^5+9 x^3+12 x$

[Done] Horatio drew a circle with a radius of [tex]$6 x cm$[/tex]. Kelli drew a circle with a radius of [tex]$18 y cm$[/tex]. What is the scale factor between these two circles? A. [tex]$\frac{1}{3}$[/tex] B. [tex]$\frac{2}{3}$[/tex] C. [tex]$\frac{2 x}{3 y}$[/tex] D. [tex]$\frac{x}{3 y}$[/tex]

[Done] Select the correct answer. Which equation is equivalent to the given equation? [tex]x^2+16 x=22[/tex] A. [tex](x+4)^2=22[/tex] B. [tex](x+8)^2=38[/tex] C. [tex](x+16)^2=278[/tex] D. [tex](x+8)^2=86[/tex]

[Done] Solve the given equation for [tex]$x$[/tex]. [tex]$\frac{x}{7}+\frac{x}{4}=\frac{9}{7}$[/tex] Select the correct choice below and, if necessary, fill in the answer box within your choice. A. [tex]$x=$[/tex] (Type an integer or a simplified fraction.) B. The solution is all real numbers. C. There is no solution.

[Done] Simplify. [tex]81^{-\frac{1}{4}}[/tex]

[Done] A flyer is spread by people at a large conference. Within one hour, the first person gives a stack of flyers to six people. Within the next hour, those six people give a stack of flyers to six new people. If this pattern continues, which summation can be used to calculate the number of people who receive a stack of flyers, not including the initial person, in the first five hours? [tex]$\sum_{n=1}^5 6(6)^{n-1}$[/tex] [tex]$\sum_{n=1}^5 1(6)^{n-1}$[/tex] [tex]$\sum_{n=1}^5 6(6)^n$[/tex] [tex]$\sum_{n=0}^4 1(6)^n$[/tex]

[Done] What is the solution to the inequality $5.25-b \geq 6.5$?