Question

Rezolvati testul va rog frumos
Dau si coroana!!!!!

Answer 1

Răspuns:

1.

c=md•100/ms

c=24•100/400

c=6%

2.

a/6=b/8=c/10=k

a=6k

b=8k

c=10k

_____+

24k=180°

k=7,5

a=45°

b=60°

c=75°

3.

M.a.=(3+rad5+3-rad5)/2=3

M.g.=rad[(3+rad5)(3-rad5)]=rad(9-5)=2

4.

10-14-x+2005=(-5)

2001-x=(-5)

-x=-2006 =>x=2006

sau

10-14-2005+x=(-5)

x=2009-5 =>x=2004

5.

a)x^2 - 6x + 9

b)25x^2 +10xy + y^2

c)(x^2 - 9)(x^2 + 9) = (x-3)(x+3)(x^2 + 9)

d)(x - rad2)(x + rad2)

6.

a)15rad6 + 8rad6 - 15rad6 = 8rad6

b)3rad3/5 + 5rad3/8 - 7rad3/10 =

(24rad3 + 25rad3 - 28rad3)/40 =

21rad3/40

c)(2 - rad3 + 2 + rad3)^(-2) =

4^(-2) =

1/4^2 =

1/16

7.

x+2y=3

-4x-2y=(-6)

_________+

-3x / = (-3) =>x=1 =>y=1