Angela has the following coins in her pocket 10p 1p 50p 2p 20p

she pulls out two coins at random

how many different combinations of pairs are there

list all the combinations write all your answers like this(10p, 1p)

you must write all answers on one line

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

What are the domain and range of the function f(x)=2^x+1

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170