Answer: Mark has 28 marbles while Don has 85 marbles.
Step-by-step explanation:
Let x represent the number of marbles that Mark has.
Let y represent the number of marbles that Don has.
If Don has 1 more than 3 times the number of marbles Mark has, it means that
y = 3x + 1
The total number of marbles is 113. It means that
x + y = 113- - - - - - - - - - - - 1
Substituting y = 3x + 1 into equation 1, it becomes
x + 3x + 1 = 113
4x + 1 = 113
4x = 113 - 1 = 112
x = 112/4
x = 28
y = 3x + 1 = 3 × 28 + 1
y = 85
Average must be 225 or more
4 games so

score1=192
score2=214
score3=250
score4=?
so


times both sides by 4 to clear fraction
656+?≥900
minus 656 from both sides
?≥244
min score is 244
Answer:
x=60
Step-by-step explanation:
divid the numbers
multiply all terms by the same value to eliminate fraction denominator
simplify