Find the value of x. If necessary, round to the nearest tenth. 9.9 in.

11.9 in

14.0 in

7.0 in.

9.9

Step-by-step explanation:

The area of a triangle is given by

A = 1/2 x*x

A = 1/2 x^2

49 = 1/2 x^2

Multiply each side by 2

98 = x^2

Take the square root of each side

sqrt(98) = sqrt(x^2)

sqrt( 2*49) = x

7 sqrt(2) = x

9.899494937 =x

To the nearest tenth

9.9 =x

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation: