12 x 12 = 144, 144 x 3 and then subtract 5 to get 427
Step-by-step explanation:
<u>Given</u>
- x + 2y = 3 and xy = 2
- show that x³ + 8y³ + 9 = 0
<u>Solution in steps:</u>
- (x + 2y)³ = 3³
- x³ + 3x²(2y) + 3x(2y)² + (2y)³ = 27
- x³ + 6x(xy) + 12y(xy) + 8y³ = 27
- x³ + 8y³ + 6(x + 2y)xy = 27 ⇒ Substitute values
- x³ + 8y³ + 6*3*2 = 27
- x³ + 8y³ + 36 - 27 = 0
- x³ + 8y³ + 9 = 0
Done
Answer:
Step-by-step explanation:
6root = 6^2= 6 x 6
= 36
6root7 = 36 x 7 = 252
Also,
5xroot7 = 5 x 7^7
= 5 x 49
= 245
Therefore,
6root7 - 5xroot7 - Xroot7 = 0
252 - 245 - 7x^2
= 7- 7x^2
Answer:
x=11
Step-by-step explanation:
Due to angles DCA and CAB being Alternate Interior Angles, we know that they will be equal. This means that
°
Next, we can find the measure of the angle DCE.
Angles BCE and BCA are supplementary. This means that they will add together to be 180°
This means that 180-BCE=BCA
Which means 
As all of the angles in a triangle must add together to be 180 degrees, we can set up the following equation
Answer:
It would be 3C, 2C, 0C, -6C, -7C, -9C, then -18C
Step-by-step explanation:
This is because the larger a postive number is above 0, the greater it is. Along with this, the smaller a negative number is, the less it is.
