Answer:
-16x
Step-by-step explanation:
6x + ? = -10x
Subtract 6x from each side
6x + ? -6x= -10x-6x
? = -16x
Answer: 12sq. in
Step-by-step explanation:
3 square inches times 4 square inches is 12 square inches
Answer:hi
Step-by-step explanation:
its d
Answer:
Quarters = 67
Nickel = 75
Step-by-step explanation:
Using simultaneous equations.
Let x represent the number of quarters and y the number of nickel.
1 quarter = $0.25
1 nickel = $0.05
Given;
Total number of coin = 142
So,
x + y = 142 ....1
Total value = $20.50
0.25x + 0.05y = 20.50 ......2
Divide equation 2 by 0.25;
x + 0.20y = 82 .....3
Subtract equation 3 from 1
y - 0.20y = 142-82
0.80y = 60
y = 60/0.80
y = 75
from equation 1
x+y = 142
x = 142-y = 142-75
x = 67
Number of each coin.
Quarters = 67
Nickel = 75
