The recyclables have been sorted into plastic and glass. the number of plastic items is 30 less than nine times the number of glass items. the recyclables are 85% plastic. how many glass items are there?
a. 6
b. 9
c. 15
d. 18

B

Step-by-step explanation:

We will use substitution method after writing 2 equations to solve for number of glass items.

Let number of glass items be g and number of plastic items be p

"The number of plastic items is 30 less than nine times the number of glass items":

We can write the equation as  

"The recyclables are 85% plastic":

This means that plastic (p) is 0.85 of  the total (p+g). Thus we can write equation as  

We can substitute the expression for p in first equation into 2nd and solve for g:

The number of glass items is 9

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

hello, there is a new name in town and that's the human spider!

answer: d.) the total number of protons and neutrons is 15

merry christmas!

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your friendly neighborhood human spider! .