Question

Oblicz:

4,5 * (-2)³=

-12:(2/3)² =

-1,5(1/3)² 4² * (1/2)³=

pierwiastek z: 49

49/64

0,49

9/25

64

1 i 7/9

0,64

2 i 7/9

Oblicz wartości wyrażeń:

x - 3y dla x= -1, y= -2

2x + 5y dla x = 1,5, y= 2,5

Answer 1

 

 

Answer 2

4,5 * (-2)³ = 4,5 * (-8) = -36

-12:(2/3)² = -12 : 4/9 = -12 * 9/4 = -27

-1,5*(1/3)² 4² * (1/2)³ = -15/10*1/9*16*1/8 = - 240/720 = - 1/3

 

pierw 49 = 7

pierw 49/64 = 7/8

pierw 0,49 = 0,7

pierw 9/25 = 3/5

pierw 64 = 8

pierw 1 7/9 = pierw 16/9 = 4/3 = 1 1/3

pierw 0,64 = 0,8

pierw 2 7/9 = pierw 25/9 = 5/3 = 1 2/3

 

x - 3y dla x= -1, y= -2

x-3y = -1-3*(-2) = -1+6 = 5

 

2x + 5y dla x = 1,5, y= 2,5

2x+5y = 2*1,5 + 5*2,5 = 3 + 12,5 = 15,5