13. (a-b)^2=a^2-2ab+b^2
B is the answer
14. B is the answer
( x+9)(x-3)= x^2+6x-27
15. B is the answer
(x+6)(x-5)=x^2+x-30
16. D is the answer
(x-6y)(x-4y)=x^2-10xy+24y^2
17. C is the answer
(2x+5)(3x-4)=6x^2+7x-20
18. B is the answer
(5x+7)(x-2)=5x^2-3x-14
It’s -9 because when multiplied it’s about -9
25÷100=0.25
0.25×680=170 is the answer
Answer:
2/9
Step-by-step explanation:
2 + 7 = 9
There are two Indian stamps, and the total is 9 stamps.
