Answer:
<u>Solved only ticked ones</u>
- 4a² + 49b² = (2a + 7b)² - 28ab = 11² - 28*2 = 65
- 4x² + 9y² = (2x + 3y)² - 12xy = 12² - 12*6 = 72
- 4x² + 9y² = (2x - 3y)² + 12xy = 2² + 12*8 = 100
- 16x² + 25y² = (4x - 5y)² + 40xy = 6² + 40*8 = 356
Answer:
Step-by-step explanation:
y+6 = -3x-15
3x + y= -21
Answer:
4 avocados
Step-by-step explanation:
$3.74/$0.89 = 4.2, but you can't have 4.2 avocados so you round down to 4
Answer:
She payed $34.60.
Step-by-step explanation:
It cost $19.60, just to rent the bike.
Then multiply $6 × 2 (hours) = 12
Now 6 ÷ 2 = 3 (half hour)
Add 12 + 3 = 15
Add everything together
19.60 + 15
You then get $34.60.
