Question

20.The area of a rhombus if its vertices are (3, 0), (4, 5), (-1, 4) and (-2,-1) taken in order, is: *
1 point
12 sq.unit
24 sq.unit
30 sq.unit
32 sq.unit
21.Equation of (x+1)^2-x^2=0 has number of real roots equal to: *
1 point
1
2
3
4
22.The roots of 100x^2 – 20x + 1 = 0 is: *
1 point
1/20 and 1/20
1/10 and 1/20
1/10 and 1/10
None of the above
23. The sum of two numbers is 27 and product is 182. The numbers are: *
1 point
12 and 13
13 and 14
12 and 15
13 and 24
24. If 1/2 is a root of the quadratic equation x^2-mx-5/4=0, then value of m is: *
1 point
2
-2
-3
3
25. The altitude of a right triangle is 7 cm less than its base. If the hypotenuse is 13 cm, the other two sides of the triangle are equal to: *
1 point
Base=10cm and Altitiude=5cm
Base=12cm and Altitude=5cm
Base=14cm and Altitude=10cm
Base=12cm and Altitude=10cm
26. The roots of quadratic equation 2x^2 + x + 4 = 0 are: *
1 point
Positive and negative
Both Positive
Both Negative
No real roots
27. The value of *
1 point
Captionless Image
4
3
3.5
-3
28. The sum of the reciprocals of Rehman’s ages 3 years ago and 5 years from now is 1/3. The present age of Rehman is: *
1 point
7
10
5
6
29. A train travels 360 km at a uniform speed. If the speed had been 5 km/h more, it would have taken 1 hour less for the same journey. Find the speed of the train. *
1 point
30 km/hr
40 km/hr
50 km/hr
60 km/hr
30. If one root of equation 4x^2-2x+k-4=0 is Areciprocal of other. The value of k is: *
1 point
-8
8
-4
4
Answer this question I will mark you as Brainliest​

Answer 1

Step-by-step explanation:

Sorry I do all the answers of this questions but brainly says it is incorrect answer.

Answer 2

Answer:

20) 24 sq.unit

22) 1/10 and 1/10

23) 13 and 14

24)