Answer:
The cost of the postage for the letter weighing 3 ounces will be $1.62
Step-by-step explanation:
From the question, we know that the first ounce will cost $0.22 and any additional ounces will cost $0.70, therefore, we can make the following equation where "c" is the total cost of the postage and "a" will be the total weight of the letter in ounces.
c = 0.22 + (0.70)(a - 1)
(we subtract 1 from "a" because for the first ounce we will pay $0.22 instead of $0.70)
Now we just solve the equation by substituting "a" with 3, and we get...
c = 0.22 + (0.70)(a - 1)
c = 0.22 + (0.70)(3 - 1)
c = 0.22 + (0.70)(2)
c = 0.22 + 1.40
c = $1.62
Therefore, the cost of the postage for the letter weighing 3 ounces will be $1.62.
So to start you should get x and y on the same side and get the numbers on one side. Then you should cancel out a variable. Because both y’s are 1 and they are opposite charges they will both cancel out to 0. Then add what is remaining which is the 2x and the 3x and equal that to +9-4 which equals 5. You want x to be all by itself so you would divide both sides by 5 and get that x=1. Then you would just substitue and solve for y. Hope this helped!
Answer:
s = 16.2 units
Step-by-step explanation:
s^2 = 15^2 + 6^2 (6 is 1/2 of 12)
s^2 = 225 + 36
s^2 = 261
s = 16.16