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Jobisdone [24]
3 years ago
6

Betty took a doll she inherited from her grandmother to the antique store. The dolls original price tag says $6.80. The antique

store said the doll was worth $84.00. What was the percent increase in price? Round to the nearest hundredth percent.
Mathematics
1 answer:
mariarad [96]3 years ago
5 0
There was a 12.35% increase in the price.
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Help please with algebra problem
Strike441 [17]
Number of weekend minutes used: x
Number of weekday minutes used: y

This month Nick was billed for 643 minutes:
(1) x+y=643

The charge for these minutes was $35.44
Telephone company charges $0.04 per minute for weekend calls (x)
and $0.08 per minute for calls made on weekdays (y)
(2) 0.04x+0.08y=35.44

We have a system of 2 equations and 2 unkowns:
(1) x+y=643
(2) 0.04x+0.08y=35.44

Using the method of substitution
Isolating x from the first equation:
(1) x+y-y=643-y
(3) x=643-y

Replacing x by 643-y in the second equation
(2) 0.04x+0.08y=35.44
0.04(643-y)+0.08y=35.44
25.72-0.04y+0.08y=35.44
0.04y+25.72=35.44

Solving for y:
0.04y+25.72-25.72=35.44-25.72
0.04y=9.72

Dividing both sides of the equation by 0.04:
0.04y/0.04=9.72/0.04
y=243

Replacing y by 243 in the equation (3)
(3) x=643-y
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Answers:
The number of weekends minutes used was 400
The number of weekdays minutes used was 243
6 0
3 years ago
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lawyer [7]

Answer: 2x(3+4)

Step-by-step explanation: 2x represents the one scoop of food twice a day, and 3+4 represents her 3 cats and 4 dogs.

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strojnjashka [21]
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You can use the formula 
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the number in 9th position is 39 so that's the 3rd quartile 
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Oksana_A [137]

Answer:

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Step-by-step explanation:

I got the answer off of khan academy

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