Use mental math to calculate 49% of 162.

can you explain all the steps i don't get it. : (

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin