Round up 15.23 to the nearest tenth

Write the converse of the following statement: if the trees have no leaves, then it is fall. if the trees have no leaves, then it is fall. the trees have no leaves, therefore it is fall. it is fall since the trees have no leaves. if it is fall, then the trees have no leaves.

It says factor each expression completely 8y+48

What is the value of x when x + 7 = 21?