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Shown in the figure, all the measurements of each sides is different, so it is only a quadrilateral. Square has four equal sides and angles, rhombus has only four equal sides, and a parallelogram whose opposite sides are parallel.

Picture 1 (Rhombus)

Picture 2 (Square)

Picture 3 (Parallelogram)

Picture 4 (Quadrilateral)

Wxndy~~

10 11/15

Step-by-step explanation:

Rewriting our equation with parts separated

=4+13+6+25

Solving the whole number parts

4+6=10

Solving the fraction parts

1/3 + 2/5 =

5/15+6/15=11/15

Combining the whole and fraction parts

10+11/15=10 11/15

The answer is in the image 

For 1 flavor there are 9 topping

Therefore, for 5 different flavors there will be 5*9 choices

No of choices= 5*9

=45 

The answer is in the image 

The total nom of  code that can be used is equal to 5+3 = 8

The solution is in the following image

The answer is in the image 

Speed=Distance/time

Here,

distance=15m

time=1sec

speed=15/1=15m/sec

Distance=Speed*time

time=15min=15*60sec=900sec

Distance travelled in 15 min=15*900=13,500m

=13500/1000 km=13.5Km

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.