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Alenkasestr [34]
3 years ago
13

A CD usually sells for $12.00. If the CD is 30% off, and sales tax is 5%, what is the total price of the CD, including tax?

Mathematics
1 answer:
iogann1982 [59]3 years ago
6 0
12*.7+5%=$<span>8.82 is your answer</span>
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Kay has 28 coins which includes nickels and dimes if the total is 2.35$, how many of each coin does Kay have?
BaLLatris [955]

Answer:

19 dimes and 9 nickels

Step-by-step explanation:

Model the situation using two equations, then solve the system.

let n be number of nickels and d be number of dimes.

n + d = 28     <= This equation is about the number of coins.

0.05n + 0.10d =  2.35   <=This equation is about the worth in dollars.

Rearrange n + d = 28.

n = 28 - d

Now we can substitute this equation into the other one.

Sub n =28-d at the "d" variable for the equation 0.05n + 0.10d =  2.35

0.05n + 0.10d =  2.35

Now there is only one variable.

0.05(28 - d) + 0.10d =  2.35   <=distribute this

0.05(28 - d) + 0.10d =  2.35

1.4 - 0.05d + 0.10d = 2.35   <=combine like terms

1.4 + 0.05d = 2.35    <= begin to isolate d

0.05d = 2.35 - 1.4

0.05d = 0.95

d = 0.95/0.05

d = 19

Now that we know d=19, we can substitute it into any equation.

Choose the equation n + d = 28 because the numbers are easier.

n + d = 28

n + 19 = 28    <=isolate n

n = 28 - 19

n = 9

Since n=9 and d=19, Kay has 9 nickels and 19 dimes.

8 0
3 years ago
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Simplify -9(2x-7)+10
Dimas [21]

Answer:

-18x+73

Step-by-step explanation:

-9 times 2x is -18x

-9 times -7 is 63

63+10=73

so, -18x+73 is your answer

6 0
3 years ago
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6. Determine the Distance between (8, -2) and (9, 3) ?
cluponka [151]
D none of the above is the answer
4 0
2 years ago
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I NEED HELP PLS I FORGOT HOW TO DO THIS HELP
KengaRu [80]

Answer:

Step-by-step explanation:

how many shapes of size A are in B ?  

I counted 9.5

then just multiply the count * the size of A

got it?

7 0
2 years ago
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What is an equation of the line that passes through the point (-4,8) and is parallel to the line x+y=6? ​
satela [25.4K]

Answer:

y = -x + 4

Step-by-step explanation:

x + y = 6 => y = -x + 6

The line that parallel to y = -x + 6 has same slope so m = -1

Using coordinates (-4,8)

y = mx + b

8 = (-1)(-4) + b

8 = 4 + b

b = 4

then y = -x + 4

7 0
2 years ago
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