All Tasks
Βiggest velocity / kinetic energy
The kinetic energy of an object is given by the equation :$ K=\frac{1}{2}mv²$.
If two objects with mass $3 kg$ and $12 kg$ have:
a) the same kinetic energy, which object has the biggest velocity?
b) the same velocity, which object have the biggest energy?
# Quadratic functions
Modeling
9
Find the area
A farmer has divided his field into 10 isembadic squares and in each one sows a different kind of vegetable.
A. Can you find the function that expresses the area of the field?
B. Ιf each square has a side of 40m find the area of the field.
# Quadratic functions
Modeling
10
Find coefficient
Find $a$ if the graph of quadratic function$f(x) = (2a+3)x^2$ is passing through the point $A(3,45)$
# Quadratic functions
Reasoning
9
A bag full of coins
Peter finds a bag with 50 coins inside. The bag only contains coins of 2 cents and 5 cents (of Euro €). If the total value of the coins is 1.81€, how many more 5 cents coins are there than 2 cents coins?
# Linear equations
Modeling
8
Linear equation with denominator.
Find the value of x solving this equation with denominators.
# Linear equations
Training
7
Linear equation with brackets.
Find the value of x solving this equation with a bracket.
# Linear equations
Training
7