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aivan3 [116]
4 years ago
8

Solve the equation 9d+1=8d-15

Mathematics
1 answer:
umka2103 [35]4 years ago
8 0

Answer:

It's A, -16.

Step-by-step explanation:

solve by moving all terms with d to the left hand side

subtract 8d from both sides

d + 1 = - 15

- 15 - 1 = -16

-16 = d

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Barney and Betty break into a parking meter with $5.05 in dimes and quarters in it, and agree that Barney get all the dimes, and
Sliva [168]
So remember that a quarter=25 cents and a dime=10 cents so
represent q=# of quarters
d=# of dimes

so barney gets dimes so replace barney with d and betty with q
barney get 5 more coins than betty
d=5+q
total=5.05=0.25q+0.10d since each is worth 0.25 and 0.10 so we have
d=5+q and 5.05=0.25q+0.10d
subsitue (5+q) for d
5.05=0.25q+0.10(5+q)
distribute
5.05=0.25q+0.50+0.10q
add like terms
5.05=0.35q+0.50
subtract 0.50 from both sides
4.55=0.35q
divide both sides by 0.35
13=q
subsitute
d=5+q
d=5+13
d=18

barney got 18 coins and betty got 13 coins



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Step-by-step explanation:

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