Apply substitution
x+4(-2x-4)=19
x – 8x – 16 = 19
-7x = 19 + 16
-7x = 35
x = -5
Then substitute this value to the other equation
y=-2x-4
y = -2(-5) – 4
y = 10 – 4
y = 6
the answer is then letter A. (-5,6)
20,21,22,23,24 add them all and you get 110
Answer:
53 1/3 mph.
I divided 320 by 6 and got this answer.
When you want to find the rule, you usually subtract the 1st and 2nd sequence. 1 1/2 - 5/6 is 4/6. So the rule is to add by 4/6. p.s - use simplest form and common denominators when subtracting
