## Todas as tarefas

#### Inverse matrix

Given a matrix $A$ and its inverse matrix $B$. Choose the correct statements. We define $I$ as the identity matrix and $A^{T}$ as the transpose of $A$. Further, $k\neq0$ is a scalar and $det(A)$ represents the determinant of A.

# Inverse

Reasoning
13

#### Valor exacto: Teoremas de ángulos

La imagen muestra dos rectas paralelas intersecadas por una tercera. Determina la medida del ángulo β e introduce el valor exacto (sin °) en el campo de respuesta de abajo.

# Angles

Training
7

#### Juio Le Parc Serie 48 - 1970

In this series, the Argentinian Op'Art artist Juli Le Parc, uses his famous 14 color palette to let mathematics mix them in a fixed but rather randomly looking way. Let's investigate what is happening there!

# Sequences

Modeling
5

#### Ampliación de polinomios

[MOOC] Halla un polinomio de segundo grado que sea divisible por $(x-1)$ y que, al dividirlo entre $(x-1)$ y entre $(x-2)$, se obtenga como resto 10 y 5 respectivamente

# Monomials & polynomials

Reasoning
6

#### Refuerzo de la división

Calcula la cociente y el resto de la división: $(2x^{5}-3x^{3}+2x-1):(x+2)$

# Polynomial functions

Learning
10

#### 3D Pythagoras

Find out the distance, in $cm$, between point $A$ and $G$. Give your answer with one decimal place.

# Pythagorean theorem

Training
8