#### Identifying translations from y=-ax²

From the green graph, corresponding to y=-ax² (a>0), obtain the equation of the blue graph and its vertex. One point of this graph is (1,-3)

# Unassigned

Reasoning
8

#### [MOOC] A spirale of numbers

Look at the spiral of numbers. See how they are increasing, starting from 1, then 2 to its left, 3 above, 4 on its right, and turning around in a clock-wise fashion. What is the number to appear just below the 10?

# Operations with natural numbers

Training
5

#### [MOOC] The far bottom-left diagonal

In the spirale of numbers, what would be the 10th number on the bottom-left diagonal, completing 1, 9, 25, 49, 81, ...

# Operations with natural numbers

Reasoning
5

#### Order pizza

You and your friends want to order pizza. Your pizza is 3 Euros more expensive than Tim's. Justin's pizza is 4 euros cheaper than yours and Marcel's pizza is 1 euro more expensive than yours. In total you pay 44€. How much do your pizzas cost each?

# Linear equations

Modeling
9

#### cube tower 2

Set up a term for the tower that can be used to determine the number of visible side faces as a function of the number of cubes.

# Terms with variables

Modeling
7

#### Which unknown is longer?

The total length of each track you see in the image is 30m. Which of the variables x or y is longer? Fill in the blanks with the words longer or shorter and your calculated values.

# Linear functions

Reasoning
9