Math Hw Help?

Question

Solve these applications:

9% sales tax on one 50 inch television that costs $940 What is the sales tax?

20% discount on one VCR that costs $104 Sales tax is 7% How much is the after-tax total?


60% discount on one Cordless Phone that costs $62 What is the discount?

You want to buy the Laptop Computer for $1,955 and also the VCR for $104. If the sales tax is 9.5%, what is your after-tax total?


Find each percent of increase or decrease. Round your answer to the nearest tenth of a percent.

95 is increased to 513


300 is increased to 372


30 is decreased to 15


47 is decreased to 41.83



thnx

Answer 1

A) 9/100 x 940 = $84.60
B) 104 x 1.07 x (1-0.20) = $89.02 (rounded)
C) 62 x (1-0.60) = $24.80
D) (1955+104) x 1.094 = $2254.61 (rounded)
E) ((513 / 95 ) – 1 ) x 100 = 440%
F) ((300 / 372 ) – 1 ) x 100 = - 24%
G) ((15 / 30 ) – 1 ) x 100 = - 50%
H) ((41.83 / 47 ) – 1 ) x 100 = - 11%

Answer 2

1)
$940 x 9%
= $940 x 9/100
= $8460/100
= $84.6

2)
[$104 x (1-20%)] x 107%
= [$104 x 80%] x 107%
= [$104 x 80/100] x 107/100
= [$8320/100] x 107/100
= $83.2 x 107/100
= $8902.4/100
= $89.024

3)
$62 x (1-60%)
= $62 x 40%
= $62 x 40/100
= $62 x 2/5
= $124/5
= $24.8

4)
$1955 + $1955 x 9.5% + $104 + $104 x 9.5%
= $1955 + $1955 x 9.5/100 + $104 + $104 x 9.5/100
= $1955 + $18572.5/100 + $104 + $988/100
= $1955 + $185.725 + $104 + $9.88
= $2140.725 + $104 + $9.88
= $2244.725 + 9.88
= $2254.605

5)
513-95/95 x 100%
= 418/95 x 100%
= 41800/95 %
= 440%

6)
372-300/300 x 100%
= 72/300 x 100%
= 7200/300 %
= 24%

7)
15-30/30 x 100%
= -15/30 x 100%
= -1500/30 %
= -50%

8)
41.83-47/47 x 100%
= -5.17/47 x 100%
= -517/47 %
= -11%

Answer 3

9% tax on $940 = $940*9/100 = $84.60

20% discount and 7% tax on $104 = $104*80/100*107/100
= $89.02

60% dicount on $62 = $62*60/100 = $37.20

95 increased to 513 = (513--95)/95% = 440% increase

300 is increased to 372 = (372--300)/300% = 24% increase

30 decreased to 15 = (30--15)/30% = 50% decrease

47 is decreased to 41.83 = (47--41.83)/47% = 11% decrease

Answer 4

1)
100% = $940
9% = x

x=9x940 / 100 = $ 84.6

2)First get the Discount .
20% = x
100% = $104
x=$20.8
Selling price = 104 - 20.8 = $83.2

100 % = 83.2
7% = y
y=$ 5.824

Price = $ 89.024

3)
100% = 62
60 = x
x= 60x62 /100 = $37.2

4)Total price = 1995+104 = 2099
2099 = 100%
x = 9.5%
x= 9.5x2099 / 100 = $ 199.405
Price after Tax = $ 2298.40

5)
95 = 100
513 = x
x = 540%
Increase = 440%

300 = 100%
372 = x
x= 124%
Increase = 24%

30 = 100
15 = x
x=50

Decrease = 50%

47 = 100
41.28 = x
x=87.82978723

Decrease = 12.17021277 %

Answer 5

1)$84.60
2)$5.82
3)$24.80