Answer:
x = number of nickels = 127
y = number of dimes = 156
z = number of quarters = 78
Step-by-step explanation:
Let
x = number of nickels
y = number of dimes
z = number of quarters
Total worth of the coins = $41.45
Total number of coins = 361
x + y + z = 361 (1)
dime = $0.1,
nickel = $0.05
quarter = $0.25
0.05x + 0.1y + 0.25z = 41.45 (2)
twice as many dimes as quarters.
y = 2z
Substitute y = 2z into (1) and (2)
x + 2z + z = 361
0.05x + 0.1(2z) + 0.25z = 41.45
x + 3z = 361
0.05x + 0.2z + 0.25z = 41.45
x + 3z = 361 (3)
0.05x + 0.45z = 41.45 (4)
Multiply (4) by 20
x + 3z = 361 (3)
x + 9z = 829 (5)
Subtract (3) from (5)
9z - 3z = 829 - 361
6z = 468
Divide both sides by 6
z = 468 / 6
= 78
z= 78
Recall,
y = 2z
= 2(78)
= 156
y = 156
Substitute the value of y and z into
x + y + z = 361
x + 156 + 78 = 361
x + 234 = 361
x = 361 - 234
= 127
x= 127
x = number of nickels = 127
y = number of dimes = 156
z = number of quarters = 78
Answer:
Pounds of grapes: 8; total cost: $5.52
Step-by-step explanation:
- Find the proportional relationship for 1. 1:0.69
- You can eliminate 3 off the top
- Try 11 first since it is the largest and the table is increasing in pounds. 11:7.59 (incorrect)
- Try 8. 8:5.52 (correct)
Answer:
1
Step-by-step explanation:
Answer:
28/9 or 3 1/9
Step-by-step explanation:
7/9 + 7/9 + 7/9 + 7/9 = litera they drink in 4 days or 7/9 x 4
7/9 • 4 = 28/9 or 3 1/9
The answe is simply 4/15. to find the answer put the whole number on the bottom and the other number on top and simplify as far as possible by dividing by the common number.
