Hello!
![\large\boxed{y = -7}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7By%20%3D%20-7%7D)
4 + y = -3
Isolate for y.
Subtract both sides by 4:
4 - 4 + y = -3 - 4
y = -7
Answer:
a+b=5/2a, a+b=5/3b
Step-by-step explanation:
1.2a=0.8b
6/5a=4/5b
6a=4b
b=3/2a, a=2/3b
a+b=3/2a+a
a+b=5/2a
a+b=2/3b+b=5/3b
Area of a square = Side × Side
Side = 7x-3
Area of the square = (7x-3) × (7x-3)
= 7x(7x-3) -3(7x-3)
= 49x^2 -21x -21x +9
=49x^2 -42x +9
Once you reach calculus, you will learn a easier way to solve this problem. You can also use a formula or TSI calculator to find it. If you don’t have either of these available, I will explain step by ste how to solve this problem on paper. You have to be able to find 7% of $320 billion. To do this, you can multiply 320 by .07. Ignore the units for now. So if you multiply 320 by .07, you should get 22.4. So 7% of $320 billion is $22.4 billion. According to the problem, the increased rate will always be 7%. There are 11 years between 2004 and 2015. Let’s find the amount of 2005 first. You would find this by taking the original $320 billion and add the 7% to it because that is how much it will increase by. Because it is increasing, you must add the 7% to the original 100%, the $320 billion. $320 plus $22.4 is $342.4 billion. This was the amount spent in 2015. Next, you would find 7% of $342.4 billion, which would be 342.4 multiplied by .07. Take the answer and add it to $342.4 billion. Continue doing this until you reach the amount spent in 2015. Hope this helps!