3. Valoarea sumei 1/0,0(5)+1/0,0(05)+1/0,0(005)+1/0,0 (0005) este:
A.22212
B.22012
C.22232
D.22213

4.
Inversul numarului
a=(-3/5)^8*(-3/5)^9:(-3/5)^2^4*(- 1)^n(n+1),unde,, n ,,apartine ,,N,, este:
A.5/3
B.3/5
C.-3/5
D.-5/3

5.
Se dau nr. a=2^61 si b=3^41 .Multimea nr. naturale ,,n,, care verifica inegalatia :
2^3n+1/3^2n+1 > a/b este:
A.{1,2,3,...,20}
B.{0,1,2,...,19}
C.{0,1,2,...,20}
D. N

Va rog frumos ajutatima la ex:3,4,5
(ar fi placut cu tot cu rezolvare)!!!
Va inplor suflet bun​

i would have to say it is c.

it is b)

hope this : )

step-by-step explanation:

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation: