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icang [17]
4 years ago
5

a computer costs 400 dollars. Its 20 percent off with an additional 5 percent off, there's no sales tax. How much does the compu

ter cost now?
Mathematics
1 answer:
zhenek [66]4 years ago
4 0

The computer costs $304 now.

Step-by-step explanation:

Given,

Cost of computer = $400

First discount = 20%

Amount of discount = 20% of $400

Amount of discount = \frac{20}{100}*400=\frac{8000}{100}

Amount of discount = $80

Price after first discount = 400-80 = $320

Additional discount = 5%

Amount of additional discount = 5% of price after first discount

Amount of additional discount = \frac{5}{100}*320=\frac{1600}{100}

Amount of additional discount = $16

Final cost = 320-16 = $304

The computer costs $304 now.

Keywords: discount, subtraction

Learn more about subtraction at:

  • brainly.com/question/10435816
  • brainly.com/question/10435836

#LearnwithBrainly

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Which linear function rule models the table below? (0,6) (5,9) (10,12) (15,15)
Dovator [93]

Answer:

y= 0.6x + 6 or y= 3/5x + 6

Step-by-step explanation:

The function for a linear function is y=mx+b.

We know that b is 6 because that is the y-intercept.

However to find m we need to see how much the x coordinates skip on the table and the y coordinates. We can see that x coordinates skip by 5s and the y corrdinates skip by 3. We than divide 3/5 to get o.6 and we get the equation. This video, tittled "Writing A Linear Equation From A Function Table" explains it much better than I can.

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4 years ago
A collection of dimes and quarters is worth $10.45. There are 70 coins in all. Find how many of each there are
Advocard [28]

There are 47 dimes and 23 quarters.

Step-by-step explanation:

Total amount = $10.45 = 10.45*100 = 1045 cents

Total coins = 70

1 dime = 10 cents

1 quarter = 25 cents

Let,

Dimes = x

Quarters = y

According to given statement;

x+y=70   Eqn 1

10x+25y=1045   Eqn 2

Multiplying Eqn 1 by 10;

10(x+y=70)\\10x+10y=700\ \ \ Eqn\ 3

Subtracting Eqn 3 from Eqn 2

(10x+25y)-(10x+10y)=1045-700\\10x+25y-10x-10y=345\\15y=345

Dividing both sides by 15;

\frac{15y}{15}=\frac{345}{15}\\y=23

Putting y=23 in Eqn 1

x+23=70\\x=70-23\\x=47

There are 47 dimes and 23 quarters.

Keywords: linear equations, subtraction

Learn more about linear equations at:

  • brainly.com/question/12954015
  • brainly.com/question/13018923

#LearnwithBrainly

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3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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