Answered

Get the answers you need at Westonci.ca, where our expert community is always ready to help with accurate information. Get detailed and precise answers to your questions from a dedicated community of experts on our Q&A platform. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

joel has twice as many CDs as Mariella has. subtracting 7 from the number of cds joel has and dividing by 3 equals the number of cds Blake has. If blake has 25 cds, how many cds does Mariella have?

Sagot :

j = number of cd's joel has
m = number of cd's mariella has
b = number of cd's blake has

from problem statement, develop equations:
j = 2m
b = (j - 7)/3 = 25
m = ?

solve for m

b = 25 = (j - 7)/3
25 = (j - 7)/3
25*3 = j - 7
75 + 7 = j
j = 82

j = 2m =  82
m = 82/2
m = 41

thus
mariella has 41 cd's
joel has 82 cd's
blake has 25 cd's






sadlife21

Answer:

We can write each of the statements as an equation

1. Joel j has twice the number of CDs as Mariella m, hence

 j=2m

2. Joel's number of CD's - 7 divided by 3 equals the number of CDs Blake b has:

 28j-729 2F3=b

3. Blake has 25 CDs

b=25

Substituting (3) into (2) gives:

 %28j-7%29%2F3=25

 j-7=3x25

 

 j-7=75

 j=75%2B7

 j=82

So Joel has got 82 CD's

Based on equation (1) we can calculate the number of CD's Mariella has:

 82=2m

 m=82%2F2

 m=41

Mariella has 41 CDs

Joel has 82 CDs

Blake has 25 CDs

Thanks for using our service. We're always here to provide accurate and up-to-date answers to all your queries. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.