Two combines are able to harvest 320 acres of crops in a certain amount of time. how many acres will (a)3, (b)4, (c)6 and (d)7 combines harvest if they work at the same rate for this amount of time?

a) 480 acres

b)640 acres

c)960 acres

d)1120 acres

Step-by-step explanation:

Two combines are able to harvest acres of crops = 320

1 is able to harvest acres of crop =

Three combines are able to harvest acres of crops =

                                                                                    =

Four combines are able to harvest acres of crops =

                                                                                    =

Six combines are able to harvest acres of crops =

                                                                                    =

Seven combines are able to harvest acres of crops =

                                                                                    =