Step-by-step explanation:
Given that,
The area of a blackboard is
The area of poster is
We need to find the unit rate of the blackboard's area to the poster's area. So, it can be calcualted by dividing blackboard's area to the poster's area.
So,
So, the rate of .
Answer:
(a) Loss from selling 15 necklaces
(b)
Step-by-step explanation:
<em>The question has missing details. (See the comment section for missing details)</em>
Given
Solving (a): Will she make a profit from 15 necklaces
To do this, we substitute 15 for b in
The inequality is not true.
<em>Hence, she'll make a loss from selling 15 necklaces</em>
Solving (b): An expression that represents profit.
To do this, we solve for b in
Collect Like Terms
Make b the subject
<em>This implies that to make a profit, she must sell more than 18 necklaces.</em>