Ms. Cook's class bought 2 bags of concrete and some bricks to build a border for their class garden. The bricks cost
$51. The total cost of the bricks and the concrete was $57.
Which equations can be used to find the cost, b, of 1 bag of
concrete?
o 2(51) + b = 57
o 2b + 51 = 57
O 2 + 51b = 57
ob + 51 = 57

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants.assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1