To find the perimeter you have to combine like terms. 8x + 5x - 6x is 7x and 6 - 5 + 12 is 13 so the perimeter of the triangle is 7x + 13
Answer:
54
Step-by-step explanation:
multiply by 1.8 and add 32
12*1.8=21.6
21.6+32=53.6
53.6 rounded = 54
Many numbers, when multiplied by

, are less than

. We can find an inequality for numbers

that are sufficient.
Clearly,

is the desired inequality. We divide by 7 to find that

determines working numbers.