Questions in mathematics

Questions in mathematics

📝 Answered - A rectangle has a length of 10 ft and a width of 6 ft. What's the perimeter? A) 16 ft B) 60 ft C) 26 ft D) 32 ft

📝 Answered - If [tex]$\begin{aligned} A & =\left[\begin{array}{ll}a & b \\ c & d\end{array}\right] \text { find the value of } \\ & -4 A+5 A\end{aligned}$[/tex]

📝 Answered - Barrett works at an ice cream shop. The function [tex]$f(x)$[/tex] represents the amount of money Barrett earns per gallon of ice cream, where [tex]$x$[/tex] is the number of gallons of ice cream he makes. The function [tex]$g(x)$[/tex] represents the number of gallons of ice cream Barrett makes per hour, where [tex]$x$[/tex] is the number of hours he works. Show all work to find [tex]$f(g(x))$[/tex], and explain what [tex]$f(g(x))$[/tex] represents. [tex] \begin{array}{l} f(x)=2 x^2+4 \\ g(x)=\sqrt{3 x^3} \end{array} [/tex]

📝 Answered - What is the cost of leasing the office space described in the table for 1 year? | | | | | :------------ | :------------ | :------------ | | Abriding Neithal | | | | Bution ys | stice (II) | Cosit (fitsteni) | | Waineltedise | ii) (odo | A | | Orite Syare | 12.000 | AB) |

📝 Answered - A system of equations can be solved using linear combination to eliminate one of the variables. [tex] \begin{array}{l} -y=-4 \quad \rightarrow \quad 10 x-5 y=-20 \\ x+5 y=59 \rightarrow \quad \frac{3 x+5 y=59}{13 x=39} \end{array} [/tex] Which equation can replace [tex]$3 x+5 y=59$[/tex] in the original system and still produce the same solution? A. [tex]$2 x-y=-4$[/tex] B. [tex]$10 x-5 y=-20$[/tex] C. [tex]$7 x=39$[/tex] D. [tex]$13 x=39$[/tex]

📝 Answered - Solve and graph the inequality $-3 y>15$.

📝 Answered - A student is asked to find the solution to this equation: [tex]$2 x-6=12$[/tex] The student's work is shown: [tex]$2 x-6=12+6=\frac{18}{2}=9$[/tex] The student's equation is [ ] equation because it is [ ]. One way we know this is [ ] and 6 is [ ] to 9.

📝 Answered - Select the correct answer. How many solutions for $x$ does the following equation have? $\frac{4}{5}(20 x+5)=16 x-2$ A. -2 B. infinite C. 0 D. 1

📝 Answered - Which expression is equivalent to $9 x-3 y-5 x+7 y+x+y ?$ A) $10 x y$ B) $4 x+4 y$ C) $5 x+5 y$ D) $5 x^2+4 y^2$

📝 Answered - Two angles are supplementary. The first angle measures $40^{\circ}$. What's the measurement of the second angle? A) $60^{\circ}$ B) $140^{\circ}$ C) $120^\circ$ D) $50^{\circ}$