There is a bag with only red marbles and blue marbles. The probability of randomly choosing a blue marble is 112.
There are 84 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation:

the opening of this porabola is facing up

step-by-step explanation:

i think its a.

hope this