Subtract 15 from both sides.
28-15=13
X=13
Answer:
slope perpendicular= -1
Step-by-step explanation:
3x-3y=-63
-3y=-3x-63 divide both sides by -3
y=1x+21
Perpendicular lines have slopes that are the opposite of the reciprocal of each other
Answer:

Step-by-step explanation:
Out of a total of 1,
went to the fair and
OF THOSE, bought atleast one book.
To find the fraction of students who bought at least one book, we will multiply both the fractions. That is the answer. Shown below:

Answer is 
Answer:
Hypothesis
Step-by-step explanation:
The hypothesis is an educated guess that can be tested through experimentation.