Whats a good explanation for a bag contains 120 marbles. Some are red and the rest are black. There are 19 red marbles for every black marble. How many red marbles are in the bag?

114 marbles

Step-by-step explanation:

From the question, we are told that a bag contains red and black marbles which are 120 marbles in total. We are further told that there are 19 red marbles for every black marble.

Let the number of black marbles be represented by a.

The red marbles will be: = 19 × a = 19a

Based on the information given in the question,

Black marbles + Red marbles = 120

a + 19a = 120

20a = 120

a = 120/20

a = 6

Black marbles = 6

Red marbles = 19a = 19 × 6 = 114 marbles

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.