A formula connecting speed(s), distance(d) and time(t) is s = d/t, where d = 160km to 2 s. f. and t = 7.2 min to 2 s. f. Work out the upper and lower bounds for s.

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Is the square root of 4 plus the square root of 16 rational?