Geometry and Algebra

 $\frac{8}{15}+\frac{7}{15}\times\frac{2}{3}$  is equal to

•  $\frac{2}{3}$  

•  $\frac{38}{45}$  

•  $\frac{22}{15}$  

 $\left(3\ +\sqrt{5}\right)^2-14=$  

•  $9+\sqrt{5}$  

•  $6\sqrt{5}$  

• 0

 $2x^2+7x-4=$  

• (2x-1)(x+4)

• (2x+1)(x-4)

• (2x+2)(x-2)

The natural numbers, solutions of $3x-1<8$    are…

• 1 ; 2 ; 3

• 0 ; 1 ; 2 ; 3

• 0 ; 1 ; 2

The table is a proportionality table, then x =

• 10

• 35

• 1.6

The price of an article increases by 8% and becomes 1 350 LL. The original price of this article is…

• 1458 L.L.

• 1242 L.L.

• 1250 L.L.

The original price of an article is 30 000 LL, and its price after the discount is 27 600 LL. The percentage of discount is…

• 10 %

• 18 %

• 8 %

In an orthonormal system, the two lines with equations: y =2x+3 and 2y + x =1 are…

• Parallel

• Perpendicular

• Intersecting at the point (1; 5)

  OAB is a triangle. The points C and F are so that:
 $\overrightarrow{OA}+\overrightarrow{OB}\ =\overrightarrow{OC}$  and  $\overrightarrow{AF}\ =\overrightarrow{OC}.$  
 Therefore:

• B is the midpoint of [CF]  .

• C is the midpoint of [BF].

• F is the midpoint of [BC]  .

(ME) and (NF) are two parallel lines, then: $\frac{NF}{ME}=$   

•  $\frac{AN}{AM}$  

•  $\frac{AE}{AF}$  

•  $\frac{AN}{MN}$