Answer:
Two lines that intersect and form right angles are called perpendicular lines.
Answer:
The maximum amount of money the chemistry club can spend without going over their buget is $81.4 ... With a total of 6 hours their allowed to use the room for.
Step-by-step explanation:
$49 is our constant and will not change. 5.40 however will. Let's use variable h for the amount hours they can rent the room for. Now we can make an inequality;
49+ 5.40h < 86.80
5.40h < 86.80
5.4h< 37.8
h< 7
Now that we know h will have to be less than seven for the chemistry club to spend less than their buget we can find that 6 is the maxium amount of hours they can spend in the room while staying within their budget.
(This answer does not consider decimals or half hours)

this is what I would come up with because.
y=the number of people infected
x=the number of days that have passed
It's 150.8
If you ever need to find that, type into google "surface area of ____"
1*y+3*x=120
y=x+12
(x+12)+3x=120
x= 27 he made 27 field goals and 39 extra point kicks<span />