1. 2 - 3z/4 = 1/8z + 9 (simplify 3/4z to 3z/4)
2. 2 - 3z/4 = z/8 + 9 (simplify 1/8z to z/8)
3. 16 - 6z = z + 72 (multiply both sides by 8 (the LCM of 4,8)
4. -6z = z + 72 - 16 (subtract 16 from both sides)
5. -6z = z + 56 (simplify z + 72 - 16 to z + 56)
6. -6z - z = 56 (subtract z from both sides)
7. -7z = 56 (simplify -6z - z to -7z)
8. z = 56/-7 (divide both sides by -7)
9. z = -8. (simplify 56/7 to 8)
So in conclusion your answer to the equation would be -8.
(6.5,7.5) is the midpoint c
The answer is A because you need to find the unit rate of each cost
Since $2.80 is for 2 liters, do 2.80/2 which equals 1.4. So that’s the cost for one liter
Then, 6 half liter bottles is just 3 liters because 6*1/2= 3. Then to find the unit rate for that, do 3.90/3 which equals 1.3.
So the first option is $1.40 per liter and the second option is $1.30 per liter so the first option is more expensive- the 2-liter bottle, and the cost for that is 1.40
Hope this helps:))
Answer: 
Step-by-step explanation:
The area of a rectangle:
×
× 
× 
-Result:
(x-4)/10=7/5
x-4=70/5
x-4=14
x=18
here you go, practice it once or twice. good luck
