The error occurred in step 2. You have to use the distributive property for the parenthesis. It is supposed to be 5p+15.
The correct solution is p>-13.
Answer:
V= 8/3
Step-by-step explanation:
First find the value of m by solving the inequality.
Solving the inequality we get value of m: m>-4
Now, for drawing the graph, a dotted line will be on -4, as values greater than -4 are included in the graph. and all the portion on right side of -4 is included in the graph.
Step-by-step explanation:
We need to draw the graph of the solution set for the following inequality. 
First we will solve the inequality and find value of m

Adding -18 on both sides

Dividing both sides by -3 and reversing the inequality i.e < is changed into >

So, value of m is: m>-4
So. for drawing the graph, a dotted line will be on -4, as values greater than -4 are included in the graph. and all the portion on right side of -4 is included in the graph.
The graph is shown in figure attached.
Keywords: Solving inequalities
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(10x+5)4 = 30x + 3x + 6x +30
40x + 20 = 39x + 30
X = 10
perimeter of the square= 420
perimeter of the triangle= 420