Answer:
Step-by-step explanation:
2{5x²-15+(-9xy²)}-(2y²+4x-xy²)+3x²
=2{5x²-15-9xy²}-(2y²+4x-xy²)+3x²
=10x²-30-18xy²-2y²-4x+xy²+3x²
=13x²-2y²-17xy²-4x-30
For number 1 ↓
A) Cards increase the score by 8 points → <span>5 + 3; 4 + 4</span>
B)Cards decreased the score by 9 points→ <span>-29 + 20; -2 +-7</span>
C) Removing cards that increase the score by 10 points → <span>-4 + -6 & -5 + -5 </span>
D. Positive cards that decrease the score by 18 points. → Well since their aren't "positive card" that'll decrease the score. It might be negative cards which will decrease the scores
For number 2 ↓
Number of Cards → 5 | -3 | -4 | 3|
New cards: 5 | -12 | 4 | 3|
5 + -12 + -4 + 3 = -8
For number 3.↓
12: |-6 | -6|
8: |4 | 4 |
So, the numbers of "cards" hand would: -6 | -6 | 2 | 2| 2| 2 | ; 4| 4
