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Nezavi [6.7K]
3 years ago
14

Gabriela bought a new pair of glasses at the store when they were having a 30% off sale. If the regular price of the pair of gla

sses was $72, how much did Gabriela pay with the discount?
Mathematics
2 answers:
Vilka [71]3 years ago
8 0
If the sale was for 30% off, then she paid 70% of the regular price

100%-30%=70% or 0.70

72*0.70=$50.40

Answer= $50.40
grandymaker [24]3 years ago
3 0
What you would want to do is make 30% into a decimal which is 0.30. Then divide  72 by 0.30 and get the answer

(I think. If I'm wrong remember this Google is your friend :D)
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Read 2 more answers
The age of some lecturers are 42,54,50,54,50,42,46,46,48 and 48 calculate the mean age and standard deviation
rjkz [21]

Answer:

Mean age: 48

Standard deviation: 4

Step-by-step explanation:

a) Mean

The formula for Mean = Sum of terms/ Number of terms

Number of terms

= 42 + 54 + 50 + 54 + 50 + 42 + 46 + 46 + 48+ 48/ 10

= 480/10

= 48

The mean age is 48

b) Standard deviation

The formula for Standard deviation =

√(x - Mean)²/n

Where n = number of terms

Standard deviation =

√[(42 - 48)² + (54 - 48)² + (50 - 48)² +(54 - 48)² + (50 - 48)² +(42 - 48)² + (46 - 48)² + (46 - 48)² + (48 - 48)² + (48 - 48)² / 10]

= √-6² + 6² + 2² + 6² + 2² + -6² + -2² + -2² + 0² + 0²/10

=√36 + 36 + 4 + 36 + 4 + 36 + 4 + 4 + 0 + 0/ 10

=√160/10

= √16

= 4

The standard deviation of the ages is 4

3 0
4 years ago
choose the equation below that represents the line passing through the point (1, −4) with a slope of 1/2. a.) y − 4 = 1/2(x − 1)
Ganezh [65]
Point (1, -4)
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c=-4 1/2
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The car would travel 247.95 miles in 4 hours and 45 minutes
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4 years ago
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kkurt [141]

Answer:

The answer is D

Step-by-step explanation:

I did it on edg

8 0
3 years ago
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