Answer: x= 2 , y= 5 (5+2=7)
Step-by-step explanation:
I don't really know how to put it into an equation- but here's your values?? Sorry if this didn't help ):
400 reduced by 4 times my age is 116...
400 - 4x = 116
-4x = 116 - 400
-4x = - 284
x = -284/-4
x = 71 <===
Answer: 
Step-by-step explanation:
The surface area of a rectangle can be calculated with:

The surface area of a trapezoid can be calculated with:

Calculate the area of the base, wich is a rectangle:

There are two equal rectangles, therefore, multiply the area of any of them by 2:

Calculate the area of the other rectangle:

There are two equal trapezoids, therefore, multiply the area of any of them by 2:

Therefore, the surface area will be the sum of all the areas calculated:
