Answer:
Step-by-step explanation:

Make two shapes out of it.
The bottom is a rectangle 14 x 5 = 70 square cm
The top is a triangle 1/2 x 12 x 5 = 30 square cm
Total area = 70 + 30 = 100 square cm
<span>The signs of the values of m and b<span> are the same.</span></span>
The value of 7 in 7,283 is 10 times the value of 7 in 2,783