Answer:
For the first one, x is 9 and y is 2. 9 + 3(2) = 15. The second is y = 3.75
6x10^3 :six times ten to the third power
Area = length x width
Area = (5x + 1)*(3x - 2)
Area = 5x*3x + 5x*-2 + 1*3x + 1*-2
Area = 15x^2 - 10x + 3x - 2
Area = 15x^2 - 7x - 2 :)
Area of a triangle=bh/2, area of a square is side squared
a=7x4=28/2=14, and since there are 3 triangles multiply and get 42
a=7x7=49
42+49=91