Answer:
it's answer is B
Step-by-step explanation:
f (x)=x (x-2)+3 (x-2)
=x2+x-6
Multiply both sides:
(2x + 2)(x + 3)
= 2x^2 + 6x + 2x + 6
= 2x^2 + 8x + 6
<h2>Answer: (1) 2x^2 + 8x + 6</h2>
Answer:Option (ii) is correct i.e. 20mph and 24mph
Step-by-step explanation:
Let us assume that the two riders are A and B
A B
Let speed of A be v mph then speed of B will be (v+4)mph
Time taken by A =3h Time taken by B=3-0.5= 2.5h
Since distance travelled by both is the same
Distance=![Speed\times Time](https://tex.z-dn.net/?f=Speed%5Ctimes%20Time)
![3\times v=2.5\times(v+4)](https://tex.z-dn.net/?f=3%5Ctimes%20v%3D2.5%5Ctimes%28v%2B4%29)
![3 \times v=2.5\times v+10](https://tex.z-dn.net/?f=3%20%5Ctimes%20v%3D2.5%5Ctimes%20v%2B10)
![3\times v-2.5\times v=10](https://tex.z-dn.net/?f=3%5Ctimes%20v-2.5%5Ctimes%20v%3D10)
![0.5\times v=10](https://tex.z-dn.net/?f=0.5%5Ctimes%20v%3D10)
Dividing both sides by 0.5
v=![\frac{10}{0.5}](https://tex.z-dn.net/?f=%5Cfrac%7B10%7D%7B0.5%7D)
mph
i.e Speed of A=20mph
∴ Speed of B=20+4 =24mph
Answer:
-11/12
Step-by-step explanation:
Answer:
9.31
Step-by-step explanation: