Answer:
Step-by-step explanation:
When a slope of a line and a point passing through it is given then we use slope - one point form to determine the equation of the line.
It is given by:
where 
is the slope of the line and
is the point passing through it.
Here, 
and 
Substituting in the equation:
Answer:
x = 3
Step-by-step explanation:
Two triangles are similar
x/(x+3) = 4/8 cross multiply expressions
8x = 4x + 12
8x - 4x = 12
4x = 12 divide both sides by 4
x = 3
Answer:
Zach can send at most 100 messages, or if x is how many messages, x≤100
Step-by-step explanation:
We will start by putting the amount of money Zach's limit has into cents. This will be 1000 cents. We will also put how much money Zach uses per message as cents, which will be 10. Now here is the first inequality you can make with this information
10x≤1000
From here you divide both sides of the inequality by 10 and get
x≤100
This is the final inequality, and it means Zach can send less than or equal to 100 messages
