-8r on both sides; -2r=16; now divide by -2; r=-8
<h3><u>
Answer:</u></h3>
<h3><u>
Step-by-step explanation:</u></h3>
- x2 + 2x + 1 + y2 + 2x + 3
- => 2x + 2x + 1 + 2y + 2x + 3
- => 4x + 1 + 2y + 2x + 3
- => 6x + 1 + 2y + 3
- => <u>6x + 4 + 2y</u>
<h3><u>
Conclusion:</u></h3>
Therefore, the above answer is correct.
Hoped this helped.

Step-by-step explanation:
The area would be 9 times compared to the area of the original square. To test this, you can let the side of the original square be equal 1. By tripling this side, the side becomes three. Utilizing the area of a square formula, A= s^2, the area of the original square would be 1 after substituting 1 for s. Then, you do the same for the area of the tripled square. With the substitution, the area of the tripled square would be 9. This result displays the area of the tripled square being 9 times as large as the area of the original square. This pattern can be used for other measurements of the square such as:
let s = 2, Original Area= 2^2 = 4 Tripled Area= (2(3))^2 = 6^2= 36. 36/4 = 9
let s = 3, Original Area = 3^2 = 9 Tripled Area - (3(3))^2 = 9^2 =81. 81/9 = 9
let s = 4, Original Area = 4^2 = 16 Tripled Area - (4(3))^2 = 12^2 = 144. 144/16 = 9
let s = 5, Original Area = 5^2 = 25 Tripled Area - (5(3))^2 = 15^2 = 225. 225/25 = 9
let s = 6, Original Area = 6^2 = 36 Tripled Area - (6(3))^2 = 18^2 = 324. 324/36 = 9
let s = 7, Original Area = 7^2 = 49 Tripled Area - (7(3))^2 = 21^2 = 2,401. 2,401/49 = 9
You can continue to increase the length of the square and follow this pattern and it will be consistent.
Let Joe initially have J dollars, and Mary have M dollars. Let the price of the T-shirt be T dollars.
i) "<span>Before they buy it, Mary has 2$ more than Joe":
means M=J+2
ii)
"</span>To buy the T-shirt, Joe spends 1 $ less than \frac{2}{5} of his money<span>"
so </span>

<span>
iii)
</span><span>"Mary spends \frac{1}{3} of her money"
</span>
means

equalize equations ii) and iii):

(they are both equal to T)
substitute M=J+2 from equation i:



6J-15=5J+10
J=25
so M=25+2=27 (dollars)
Together Mary and Joe had 27+25=52 (dollars)
Answer: 52 $