Løsning af matematiske opgaver

Matematik aflevering.

A) 10 – 5x = 4 ( x +1)

10 – 5x = 4x +4

6 = 9x

9/6 = 0,66

x = 0,66

B) (5x + 30 - 7) * 2 = 2x +31 -6

10x +60 -14 = 2x + 25

8x = -21

-21/8 = -2,625

x = -2,625

( 38 cm - 2*12 cm ) / 2 = ( 38 cm - 24 cm ) / 2 = 7 cm

A) 2-5-7-10-13

B) 4-3-6-5-8-7-10-9

C) 4-8-10-20-22-44-46-92-94

D) 1-6-24-120-720-5040-40320

A) 10/40-5/20

B) 4/40-2/20

C) 20/40-10/20- 5/10

D) 1/40

Løs uligheden (6x -3 > 2x +13)

6x -3 > 2x +13

4x >16

x >4

15,5 kg a 32,5 kr......15,50 * 32.5 = 503,75kr7,4 kg a 18,25 kr........7,40*18,25 ='135,05kr6 kg 50 g a 9,5 kr........6,o5* 9,5. = 57.475kr

Sum =696.275kr

Herfra moms 153,1805

ialt inklusivt moms 849,4555kr

Afrundet til kontant betaling 849,50kr

Afrundet til betaling via overførelse 849,46kr

–

(12 cm)*(4,5 cm)*(30 cm))*(5,3 g/cm3) = ((12*4,5*30) cm3)*(5,3 g/cm3) =

(1620 cm3)*(5,3 g/cm3) = ((1620*5,3)*(cm3*(g/cm3)) = 8586 g