Question

Plz solve q 4 to 11

Answer 1

5.

0.30x + 0.50=0.40x - 0.20
0.70=0.10x
X=0.70/0.10
ie,x =0.7divided by 0.1
Lets multiply by 10 on the numerator and denomination...
Then the answer is 7/1 which is 7

So the answer is 7

Hope u are clear with it......




4.


Area of a Rectangle is equal to length * width.. So as per the question :
Width=x
LENGTH =x+3
Area of this Rectangle =x * (x+3)
=(X square +3x) meter square
So,lets substitute the area of the Rectangle here:

X square + 3x = 54
X square + 3x + 54 = 0
X^2 + 3x + 54=0

Now use splitting middle term law.... And substitute the value with x