#### Holiday

Family Miller makes a holiday. They pay 34.20 € at a fuel station for 18 l of fuel. Calculate the price for 54 l of fuel.

# Unassigned

Modeling
7

#### From law to graph

The law of the proportional function is f(x) = - 0.75x. Cross which graph represents to this law.

# Unassigned

Training
8

#### Points on a graph 2

Give all solutions for c, so that the point P(1; 4) is a point on the graph of f(x) = (x+c)² + 4.

# Unassigned

Training
8

#### Points on graph 1

Give all solutions for c, so that the point P(2; 6) is a point on the graph of f(x) = x² + c.

# Unassigned

Training
8

#### Calculating coordinates

Calculate the x-coordinate of the point P(x; -3) on the graph of a proportional function with f(x) = - 1.5x

# Unassigned

Training
8

#### Gaussian Elimination and Matrix Inverse

Find the inverse of a matrix $A = \begin{bmatrix} 2&1& 1\\-1&0&-{1 \over 2}\\0&0&1\end{bmatrix}$ using Gauss – Jordan Method (write the matrix using decimal numbers).
# Inverse
# Elementary operations

Training
13