Hi can anyone plz help me with this and can you explain how you got it

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section