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disa [49]
3 years ago
12

A + 12.5 = 20 Solve the following equation and show work

Mathematics
2 answers:
makkiz [27]3 years ago
5 0
A + 12.5 = 20
- 12.5 -12.5
———————
A = 7.5
The answer is 7.5
vova2212 [387]3 years ago
5 0
A = 7.5


What you do is add .0 to 20 so you can subtract 20.0 - 12.5. Below is how you would solve it. That’s how you get 7.5

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Read 2 more answers
Kay has 28 coins which includes nickels and dimes if the total is 2.35$, how many of each coin does Kay have?
m_a_m_a [10]

Answer:9 nickels and 19 dimes.

Step-by-step explanation:

Let n be the number of nickels Kay has.

Let d be the number of dimes Kay has.

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Value of n nickels is $0.05n

Value of 1 dime is $0.1

Value of d nickels is $0.1dn

Given that Kay has a total of 28 coins.

So,n+d=28                                                ...(i)

Given that Kay has a total value of $2.35

So,0.05n+0.1d=2.35                                 ...(ii)

Using (i) and (ii),

0.05n+0.1(28-n)=2.35\\0.05n+2.8-0.1n=2.35\\2.8-2.35=0.05n\\0.45=0.05n\\n=9

d=28-n=28-9=19

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