The polygons are similar the area of one polygon is given find the area of the other polygon ​

90

Step-by-step explanation:

So to find the area of the triangle you do basexheight/2 I had the base which was 4 so I had to figure out what times 4 divided by 2 equals 10? So I knew 20/2 = 10 so then I made it easier for myself I would just have to do 4x?=20, that's 5! So then 4x5=20/2= 10 the area for triangle one, so then I had to find the ratio 4/12= 0.3 which would mean I would have to multiply 5x3 so then I got 15, then I plugged it in the problem 12x15=180/2= 90!

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w