🧮 algebra

1. Il problema chiede di trovare il totale dei soldi che aveva il signor Mario, sapendo che ha speso 7428, che corrispondono a $\frac{3}{16}$ del totale. 2. Indichiamo con $T$ il t

1. **Stating the problem:** Calcolare il valore dell'espressione $$ (2a^2 b) \left(-\frac{1}{2} ab\right)^3 : \left(-\frac{1}{4} ab^2\right)^2 - 8 (a^2 b)^2 $$.

1. **State the problem:** We need to find the values of $k$ for which the quadratic equation $$x^2 - kx + 4 = 0$$ has no real roots. 2. **Recall the discriminant condition:** For a

1. **Problem:** Solve the inequality $m + 11 + 8m > 29$. 2. **Combine like terms:**

1. **State the problem:** Solve the linear equation $3x - 1.5 = 16.5$ for $x$. 2. **Formula and rules:** To solve for $x$, isolate $x$ on one side by performing inverse operations.

1. **State the problem:** Solve the linear equation $$7x + 23 = 79$$ for $x$. 2. **Formula and rules:** To solve for $x$, isolate $x$ by performing inverse operations. Subtract 23

1. **State the problem:** Find the square root of 19.6. 2. **Recall the formula:** The square root of a number $x$ is a value $y$ such that $$y^2 = x.$$ Here, we want to find $y$ s

1. **State the problem:** We need to order the given expressions from least to greatest. 2. **List the expressions:**

1. **State the problem:** We need to simplify the expression $\sqrt{242}$. 2. **Recall the formula and rules:** The square root of a product can be written as the product of the sq

1. **State the problem:** Simplify the expression $\sqrt{96}$. 2. **Recall the formula and rules:** The square root of a product can be expressed as the product of the square roots

1. **State the problem:** Find the exact values of $u_2$ and $u_3$ given a recurrence relation (not explicitly stated here) and that $u_n \to l$ as $n \to \infty$. Then find the ex

1. The question asks why we use 8 years in part (a). 2. Usually, the number of years corresponds to the time period given or required in the problem.

1. **State the problem:** Simplify the expression $$-y^2 + (-12) - 7y - (-5y^2) + 3y - 16$$. 2. **Recall the rules:**

1. **State the problem:** We need to simplify the expression $1 \frac{1}{3} - \frac{1}{3} - \frac{4}{5}$. 2. **Convert the mixed number to an improper fraction:**

1. **State the problem:** Simplify the expression $$-y^2 + (-12) - 7y - (-5)y^2 + 3y - 16$$. 2. **Rewrite the expression clearly:**

1. **State the problem:** We need to find the sum of the fractions $\frac{5}{6} + \frac{2}{7} + \frac{1}{2}$.\n\n2. **Formula and rules:** To add fractions, they must have a common

1. **State the problem:** We need to find the sum $$\sum_{r=6}^N \frac{1}{r^3 - r}$$ in terms of $N$. 2. **Rewrite the denominator:** Notice that $$r^3 - r = r(r^2 - 1) = r(r-1)(r+

1. Das Problem lautet: Löse die Gleichung $$\frac{2x+4}{3} = 6$$. 2. Die Formel, die wir verwenden, ist das Lösen von Gleichungen durch Multiplikation beider Seiten mit dem Nenner,

1. **Stating the problem:** Add and subtract the given algebraic fractions:

1. **Problem statement:** Alan and Barry share a box of stickers in the ratio 3:2. Alan gives 20% of his stickers to Clara, who initially has none. We need to find the ratio of Ala

1. **State the problem:** Solve the simultaneous equations using substitution method: $$3x + 1.4y = 0.1 \quad (1)$$