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:
I need context
Step-by-step explanation:
Answer: room 101 and room 107
Step-by-step explanation:
In room 101, the ratio of boys to girls is 16:12. This is further simplified to its lowest fraction by dividing by 4. It becomes 4:3
In room 104, the ratio of boys to girls is 20:9. This cannot be further simplified to its lowest fraction.
In room 107, the ratio of boys to girls is 12:9. This is further simplified to its lowest fraction by dividing by 3. It becomes 4:3
Therefore, room 101 and room 107 have the same ratio.
The difference is that one is different and the other is not 259
Let's recall that in a parallelogram:
1. The opposite sides are paralell
In our exercise. sides CZ and KG are paralell. And so do sides KC and GZ.
2. Those opposite sides are equal in length.
3. The opposites angles are equal. In our exercise, angle C and G are equal and so do angles K and Z.
4. That also mean that the angles at the top of the figure are supplementary. It means they add up to 180 degrees. We have the same situation with the two angles at the bottom of the parallelogram.
In our case then:
Now, we can find the measure of angles K and Z, as follows:
