Tom and his five friends contributed money for a braai. Tom contributed R300 and that was a quarter of all the money contributed. What was the total amount contributed?​

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?