Answer:
B
Step-by-step explanation:
Two friends + Bud = 3 people
7/10 = 70%, or less than a full cake
D is more than a full cake so this cannot be the answer.
C is 3/4 which 75% for <em>each</em> person, but there is only 70% to begin with so this is impossible.
B is 1/4 for each person also known as 25% for each person. 25% × 3 people = 75% which is slightly over how much cake Bud has (70%).
A is 1/2 for each person, but there isn't enough cake to go around to give each person a half piece.
The soundest solution would be B. Since the problem calls for estimations, B gives about 25% to each person, totaling to 75% after 3 people. Although we only have 70%, we are only estimating. A 5% difference is a good estimate.
Answer:
- x = 31 - 2y - 3z
- y = (31 - x - 3z)/2
- z = (31 -x -2y)/3
Step-by-step explanation:
Subtract the terms not containing the variable of interest, then divide by the coefficient of the variable.
x = 31 -2y -3z . . . . . the coefficient of x is 1, so we're done
__
2y = 31 -x -3z
y = (31 -x -3z)/2
__
3z = 31 -x -2y
z = (31 -x -2y)/3
Answer:
4
Step-by-step explanation:
5y - 2 = 18
adding 2 to both sides
5y -2 + 2 = 18 + 2
5y = 20
Dividing 5 in both sides,
5y / 5 = 20/5
y = 4