Can anyone use proportion I need help

Since the are similar triangles, the large triangle has a height of 6 and a base of 6. So the smaller triangles height must equal its base. Therefore x=4

The answer x should be 4

Hi! mark me brainliest if i : )y = 0.213x – 352.0    represents this linear model shown in the data table.plug in the values of x into the equation for a double check.let's try 1980.y = 0.213(1980) – 352.0y = 69.74which is closest to the 70.1 whereas other options do not satisfy the condition. 

You must find the surface of the block therefore 98187 dived by 5628 = 583m squared