Answer:
the value of z is 4 sjsjsndndndm
<span>Chemistry is the branch of science that deals with the identification of the substances of which matter is composed. </span>
Let x be the number in the problem. When it states that x is "no more than -10", it means than it is less than or equal to -10. So, we have

x≤-10
In order to cancel out the

on the left and isolate x, we multiply both sides by

(since

·

=1). Thus, we have
x≤-10·

=-15
Therefore, x≤-15