Question

Proszę o rozeiazanie daje dużo pkt

Answer 1

zad.7

1:5 = 1/5
1/(1/5)² = 25

Odp:C

zad.8
P = 5 dm²
d₁ = 20 cm = 2 dm
P =d₁*d₂/2
5 = 2*d₂/2
d₂ = 5 dm = 50 cm

Odp:C

zad 9

(n - 2) • 180° = (7 - 2) • 180° = 900°

Odp. A

zad. 10

(n² - 3n)/ 2

n = 5
1. (5² - 3*(5))/2
2. (25 - 15)/2
3. 10/2 = 5
n = 6
1. (6² - 3*(6))/2
2. (36 - 18)/2
3. 18/2 = 9

n = 7
1. (7² - 3*(7))/2
2. (49 - 21)/2
3. 28/2 = 14

n = 8
1. (8² - 3*(8))/2
2. (64 - 24)/2
3. 40/2 = 20

Odp. C