Answer:
Mark has 13 marbles
Don has 40 marbles
Step-by-step explanation:
Let the number of Mark's Marbles = M
Let the number of Don's Marble = D
D = 1 + 3M - - - - (1) (Don has 1 more than 3 times the number of marbles Mark has)
D + M = 53 - - - - - (2) (total number of marbles is 53)
puttin the value of D from equation (1) into equation (2)
(1 + 3M) + M = 53
1 + 3M + M = 53
1 + 4M = 53
4M = 53 - 1 = 52
4M = 52
M = 52 ÷ 4
M = 13
finding D by putting the value of M (M = 13) into equation 1
D = 1 + 3M - - - - (1)
D = 1 + 3 (13)
D = 1 + 39
D = 40
∴ Mark has 13 marbles
Don has 40 marbles
Answer:
D: 13
Step-by-step explanation:

I hope I helped you! Please mark me brainiest if I am correct. Thanks!
The Answer to your question I believe is False…
I hope this helped
Answer:
Part A: w(t)=60-4t
Part B: w(15)=60-60=0
The cooler will be empty after 15 minutes.
Step-by-step explanation:
Based on the information given the required production is 13,000 units.
<h3>Required production</h3>
Using this formula
Required production=Budgeted sales units+Ending inventory units-Beginning inventory units
Let plug in the formula
Required production=10,000 units+5,000 units-2,000 units
Required production=13,000 units
Inconclusion the required production is 13,000 units.
Learn more about required production units here:brainly.com/question/13061264