The answer is
q + d = 12
0.25q + 0.10d = 2.40
q - the number of quarters
d - the number of dimes
You have 12 <span>coins, all quarters and dimes:
q + d = 12
The value of 1 quarter is $0.25.
The value of 1 dime is $0.10.
Therefore, if you want to pay </span>$2.40 you will have q quarters of value $0.25(0.25q) and d dimes of value $0.10d (0.10d).
The second equation is:
0.25q + 0.10d = 2.40
Answer:
AB = 6.4
Step-by-step explanation:
Assuming that AB + BC is AC, then we can say the following:
AB + BC = AC
AB + 6.8 = 13.2
AB + 6.8 + -6.8 = 13.2 + -6.8
AB = 6.4
Cheers.
Step-by-step explanation:
K=4
I think so
have a great day ahead
Let r be the rate at which oil production is decreasing from the well. Then:
5000000 x r^6=2500000
r^6=.5
ln r^6=ln .5
6 ln r=-0.69314718055994530941723212145818
ln r=-0.11552453009332421823620535357636
r=e^-0.11552453009332421823620535357636=.891
Since the oil production is only 0.891 of the previous year, the annual rate of loss is 0.109, or 10.9%, growing annually
A.3000000=5000000x(.891)^t
.6=0.891^t
t=4.42 years
Oil is being pumped at .60 of original production
B.250000=5000000 x 0.891^t
.05=.89^t
t=25.96 years
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