One question at a time, please. I will focus on #16 and ignore #18.
slope: 3/4 line passes thru (-8,2)
Write out y = mx + b. Subst. 2 for y. Subst. -8 for x Subst. (3/4) for m:
2 = (3/4)(-8) + b. Find b. 2 = -6 + b => b = 8
So your equation is y = (3/4)x + 8. Please, use ( ) around those fractions!
Answer:

Step-by-step explanation:
Step 1: Write out limit

Step 2: Evaluate
(2 + 1)(3(2)² - 9)
3(3(4) - 9)
3(12 - 9)
3(3)
9
Answer:
it is 12
Step-by-step explanation:
because the square root of 12 is 3.46410162
can you select me to be brainlyest
Answer:
Lines 2 and 4
Step-by-step explanation:
Perpendicular: Opposite slope
1 and 3 have the same slope, and if you solve 4, you get y=2x-7 and 2x is opposite of 1/2x.