2x^2−5xy+y^2 - (x^2+4xy −3y^2)
= 2x^2−5xy + y^2 - x^2 - 4xy + 3y^2
= x^2 - 9xy + 4y^2
answer
x^2 - 9xy + 4y^2
For the answer to the question above,
use the concept of ratio and proportion. The ratio between 1 cm to 21 km should be the same as the ratio of 3.1 cm to the actual distance. Let x be the unknown actual distance and mathematically express the situation,
(1 cm/ 21 km) = (3.1 cm / x km)
This equation gives a value for x which is 65.1 km. Therefore, the answer is letter C.
The answer is 4 of the set
Answer:
the second option
Step-by-step explanation:
5+(1+3)= (5+1) +3
hope this helps :)
