GuideFoot - Learn Together, Grow Smarter. Logo

Questions in Grade High-school

📝 Answered - If [tex]f(x)=\left\{\begin{array}{ll}2 x+1 & x\ \textless \ 0 \\ 2 x+2 & x \geq 0\end{array}\right.[/tex] Then find 1) [tex]f ( 0 )=2(0)+2=2[/tex] 2) [tex]f (- 1 )=2(-1)+1=-1[/tex] 3) [tex]f ( 2 )=2(2)+[/tex] ? 4) [tex]f ( 0 )+ 3 f (- 1 )- 5 f ( 2 )=2+3(-1)- S (6)=-31[/tex] [tex]=6[/tex] 5) [tex]f\left(t^2+1\right)=[/tex]

📝 Answered - Which of the following is the equation for a circle with a radius of $r$ and center at $(h, v)$? A. $(x+h)^2+(y+v)^2=r^2$ B. $(x-v)^2+(y-h)^2=r^2$ C. $(x-h)^2+(y-v)^2=t^2$ D. $h^2+v^2=t^2

📝 Answered - Fill in the gaps to balance the equation. Use the smallest set of whole numbers to balance the equation and include coefficients of "1" when appropriate. [tex]$\square$ Na _3 N+$ $\square$ SrF _2 \rightarrow$ $\square$ NaF +$ $\square$ Sr _3 N_2[/tex] Complete the table to determine how many atoms of each element are present in the reactants and products. | Element | Reactant | Products | | :------ | :------- | :------- | | Na | [tex]$\square$[/tex] | [tex]$\square$[/tex] | | N | [tex]$\square$[/tex] | [tex]$\square$[/tex] | | Sr | [tex]$\square$[/tex] | [tex]$\square$[/tex] | | F | [tex]$\square$[/tex] | [tex]$\square$[/tex] |

📝 Answered - The center of an ice rink is located at $(0,0)$ on a coordinate system measured in feet. Sandi skates along a path that can be modeled by the equation $y=0.08 x^2-1.6 x+13$. David starts at $(20,13)$ and skates along a path that can be modeled by a quadratic function with a vertex at $(10,5)$. Which system of equations models the paths of the two skaters? $\begin{array}{l} y=0.08 x^2-1.6 x+13 \text { and } y=0.08(x-10)^2+5 \\ y=0.08 x^2-1.6 x+13 \text { and } y=1.6(x-10)^2+5 \\ y=0.08 x^2-1.6 x+13 \text { and } y=0.8(x-10)^2+5 \\ y=0.08 x^2-1.6 x+13 \text { and } y=5(x-10)^2+5 \end{array}$ How many real solutions does the system of equations have?

📝 Answered - The ice skating rink charges an hourly fee for skating and $3 to rent skates for the day. Gillian rented skates and skated for 3 hours and was charged $21. Which equation represents the cost, $c(x)$, of ice skating as a function of $x$, the number of hours of skating? A. $c(x)=3x+3$ B. $c(x)=6x+3$ C. $c(x)=7x+3$ D. $c(x)=8x+3

📝 Answered - Graded Quiz: Decimals Question 3 (5 points) If a 10-pound sack of potatoes costs $6.55, how much would 1 pound cost? Round your answer to the nearest cent.

📝 Answered - Which of the following circles have their centers in the third quadrant? Check all that apply. A. $(x+14)^2+(y-14)^2=84$ B. $(x+9)^2+(y+12)^2=36$ C. $(x+3)^2+(y-6)^2=44$ D. $(x+16)^2+(y+3)^2=17

📝 Answered - Fill in the gaps to balance the equation. Use the smallest set of whole numbers to balance the equation and include coefficients of "1" when appropriate. [tex]$\square$ $Na _3 N+$ $\square$ $SrF _2 \rightarrow$ $\square$ $NaF +$ $\square$ $Sr _3 N_2$[/tex] Complete the table to determine how many atoms of each element are present in the reactants and products. | Element | Reactant | Products | | :------ | :------- | :------- | | Na | $\square$ | | | N | $\square$ | $\square$ | | Sr | $\square$ | $\square$ | | F | $\square$ | $\square$ |

📝 Answered - Consider the chemical equations shown here. [tex]$\begin{array}{l} CH_4(g)+2 O_2(g) \rightarrow CO_2(g)+2 H_2 O(g) \Delta H_1=-802 kJ \\ 2 H_2 O(g) \rightarrow 2 H_2 O(l) \Delta H_2=-88 kJ \end{array}$[/tex] Which equation shows how to calculate [tex]$\Delta H_{ rxn }$[/tex] for the equation below? [tex]$CH_4(g)+2 O_2(g) \rightarrow CO_2(g)+2 H_2 O(l)$[/tex]

📝 Answered - If [tex]f(x)=\left\{\begin{array}{cc}x^2+2 & x \ \textless \ 1 \\ x-3 & x \ \textgreater \ 1\end{array}\right.[/tex] then find [tex]f(1)[/tex] if exist [tex]=[/tex] does nt exist