Answer:
number of $20 bill = 4
Number of $5 bill = 5
Step-by-step explanation:
Given that:
Total number of $5 and $20 bills = 9
Let :
Number of $5 bills = x
Number of $20 bills = y
Combined worth of all bills = $105
x + y = 9 - - - (1)
5x + 20y = 105 - - - (2)
From (1)
x = 9 - y
Substitute x = 9 - y into (2)
5(9 - y) + 20y = 105
45 - 5y + 20y = 105
15y = 105 - 45
15y = 60
y = 60/15
y = 4
x = 9 - y
x = 9 - 4 = 5
Hence,
number of $20 bill = 4
Number of $5 bill = 5
Answer:
n = -0.7
Step-by-step explanation:
-2n+1.8=3.2
subtract 1.8 from both sides of the equation:
-2n = 1.4
divide both sides by -2:
n = -0.7
Answer:
i think 103.76 + 17.43
Step-by-step explanation:
Answer:
x=7
Step-by-step explanation:
3*7*7 = 147
147-16 = 131
so x=7
note x could be -7 also
