Simplify: 5 times the quantity 2 m + 6 n minus 3 n
a. 10m + 15n
b. 10m + 6n - 3n
c. 7m + 11n - 2n
d. 10m + 11n - 2n

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Adaycare center charges a $75 enrollment fee plus $100 per week. which of the following represents the cost of sending a child to daycare for 14 weeks?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi