Respuesta :

afzalhossain9507

Answer:

4

Step-by-step explanation:

1/2 ×base ×height =40

1/2 × (x+4) × x=40

(x+4) + x =80(40×2)

x×x + 4x =80

x×x + x =80/4

x×x +x =20

x=4

hope it helps....plz mark me brainliest :)

EveryNameTaken

Answer:

For x the answer I got was 7 and if that is not correct then the other one was -16. Can you let me know if I got it right