Step-by-step explanation:
first you need m and m is -15/5 that means -3
your function is mx =y so your function is -3x= y
to get the equation of any straight line we simply need two points off of it, hmmm let's use the points in the picture below for "a".


Answer:
subtract 6.5 by 9.75
Step-by-step explanation:
9/12 =.75
6/12=.5
9.75-6.5=3.25
hope this helps
°_°
Answer:
see explanation
Step-by-step explanation:
Using the trig identity
sin²x + cos²x = 1 , then
sin²x = 1 - cos²x
cos²x = 1 - sin²x
Consider the left side
sin²A - cos²B
= (1 - cos²A) - (1 - sin²B) ← distribute parenthesis
= 1 - cos²A - 1 + sin²B
= sin²B - cos²A
= right side , thus verified