🧮 algebra

1. **Problem:** Find the difference between $A$ and $B$, and explain $A$ or $B$. 2. **Formula used:**

1. **Problem statement:** Draw a simple example of sets like $A$ or $B$. 2. A set is just a collection of distinct items. A helpful way to show a set is to use a circle labeled wit

1. **State the problem:** Solve the equation $$\frac{L+2}{L-2} = \frac{-4}{L+2}$$ for $L$. 2. **Formula and rules:** To solve rational equations, we cross-multiply to eliminate den

1. **State the problem:** Solve the equation $$\frac{6}{x+3} = \frac{-2x}{x+3}$$ for $x$. 2. **Identify the domain restriction:** Since the denominators are $x+3$, we must have $x

1. Das Problem: Wir wollen eine quadratische Funktion $f(x) = ax^2 + bx + c$ bestimmen. 2. Fall 1: Gegeben sind drei Punkte $(x_1,y_1)$, $(x_2,y_2)$, $(x_3,y_3)$.

1. **State the problem:** We need to choose the equation of the line shown in the graph. 2. **Use the slope-intercept form:** The formula for a line is $y=mx+b$, where $m$ is the s

1. The problem asks for the minimum output value of the function $$f(x) = 3(x - 1)(x - 7)$$. 2. This is a quadratic function in factored form. Since the coefficient of the quadrati

1. **State the problem:** Jane owns comic books such that the number she owns is 1 less than 2 times the number Derrick owns. Together, they have 11 comic books. We need to find ho

1. **Problem:** Evaluate $\frac{1}{2}+\frac{1}{2}$.\n2. Use a common denominator. Since the denominators are already the same, add the numerators: $\frac{1}{2}+\frac{1}{2}=\frac{1+

1. **State the problem:** Add the fractions $\frac{1}{2} + \frac{1}{2}$ and simplify the result. 2. **Formula and rules:** When adding fractions with the same denominator, add the

1. **State the problem:** Solve the equation $$\frac{e^{0.0227t}}{e^{-0.0346t}} = 2.5$$ for $t$. 2. **Use the properties of exponents:** Recall that $$\frac{e^a}{e^b} = e^{a-b}$$.

1. **State the problem.** We need to solve the system $2x+3y=7$ and $x-y=1$, then find the value of $x+y$.

1. **State the problem:** Solve the system of equations for $x$ and $y$: $$\begin{cases} 2x + y = 8 \\ 2x - y = 12 \end{cases}$$

1. **Problem:** Find the limit $\lim_{x\to 3}\frac{x^2-9}{x-3}$.\n2. **Formula and rule:** When a direct substitution gives $\frac{0}{0}$, factor the numerator and cancel the commo

1. **State the problem:** We are given two linear equations: $$2x + 3y = 7$$

1. **State the problem:** Solve the system of equations for $x$ and $y$: $$\begin{cases} 2x + y = 8 \\ 2x - y = 12 \end{cases}$$

1. **State the problem:** We are given the system of equations: $$2x + 3y = 7$$

1. **State the problem:** Solve the system of linear equations for $x$ and $y$: $$2x + y = 8$$

1. **State the problem:** We are given the system of equations: $$2x + 3y = 7$$

1. **State the problem:** We have a sequence defined by the recurrence relation $$u_{n+1} = k u_n + k$$ where $k$ is a constant. Given: $$u_1 = 9$$ and $$u_2 = 4$$.

1. **State the problem:** Simplify the expression $$\left( \frac{-vu^3}{2u^4v^{-3} \cdot -u^4v^{-4}} \right)^3$$. 2. **Rewrite the denominator:** Multiply the terms inside the deno