Et ce que quelq'un peux m'aider svp a) J'ai acheter 12m de ruban pour 5,40 euros.
Combien coutent 7m de ruban?

b)J'ai utilisé 50kg de semences pour un terrain de 1600 m²
Quelle surface aurais-je pu ensemencer avec 90kg de semences?

c) En roulant a une vitesse moyenne de 72 km/h, quelle est la distance parcourue en 25 minutes ?

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

He concluded that a heavier object dropped from the same height as a lighter object will land

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z