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

A. 6.9 in.

B. 11.7 in.

C. 13.7 in.

D. 9.7 in.

D. 9.7 in.

Step-by-step explanation:

the picture in the attached figure

we know that

area of the triangle is equal to

in this problem

A=47 in²

b=x

h=x

so

therefore

the answer is

x=9.7 in

step-by-step explanation:

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation: