The simplest expression is (2w)+(2*3w), because to calculate perimeter, you have to use this formula: 2length+2width.
Answer:
252
Step-by-step explanation:
if you go around the faces, 20*5 is 100, 20*4 is 80, 20*3 is 60, 2*3 is 6 and another 2*3 is 6. add these together
RemarkThe very easiest way to do this is by substitution. The ys are isolated on the left. When you equate what's on the right, you can solve this for 1 variable, the xs.
Substitute and solve8x - 9 = 4x -1 Subtract 4x from both sides.
8x - 4x - 9 = - 1
4x - 9 = - 1 Add 9 to both sides.
4x = - 1 + 9
4x = 8 Divide by 4
x = 8/4
x = 2
Solve for yUse either equation to solve for y.
y = 4x - 1
y = 4(2) - 1
y = 8 - 1
y = 7
Answer
The equations intersect at (2,7)
Part B
See the graph below. Notice the intersect point.
The sum of 7/9 and 3/5 is 7/15