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viktelen [127]
3 years ago
9

Please help. My questions never get answered

Mathematics
1 answer:
Sidana [21]3 years ago
7 0
Download the first app scan your hw and it will explain to you and give you the answers. Very useful and works it out!

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A store is having a sale in which all items are reduced by 20% including tax. Jennifer paid $21 for a pair of shorts if the sale
Julli [10]
<u><em>Answer:</em></u>
original price of pants = $25

<u><em>Explanation:</em></u>
<u>First, let's calculate the price of shorts after discount:</u>
Assume that the price of shorts after the discount is x
Total payment = price of shorts + taxes

<u>We know that:</u>
total payment = $21
taxes = 5% = 0.05 of the price

<u>This means that:</u>
21 = x + 0.05x
21 = 1.05x
x = $20

Therefore, <em>the price of the shorts is $20 after the discount</em>

<u>Now, we will get the price of the shorts before the discount:</u>
Assume that the price of shorts before discount is y

<u>We know that:</u>
The discount was 20%
This means that Jennifer paid:
100% - 20% = 80% of the price of the shorts

<u>Therefore:</u>
80% of the price = $20
0.8y = 20
y = $25

This means that <u>price of shorts before discount was $25</u>

Hope this helps :)

7 0
3 years ago
Read 2 more answers
You have a bag with 100 pennies. One of the 100 pennies is weighted so that it lands on heads 90% of the time. The rest of them
masha68 [24]

Answer:

0.160275

Step-by-step explanation:

P(5 time heads) =P(fair penny and 5 time heads + weighted penny and  5 time heads)

probability of fair penny = 99/100 (as one is removed)

probability of heads = 50% = 0.5 flipped 5 times

probability of weighted penny = 1/100

probability of heads for this penny = 90% = 0.9

substituting, we have

=(99/100) * (1/2)*5  +  (1/100) * (0.9)5  = 0.036842

hence from Bayes theorem

P(weighted penny | 5 time heads) =P(weighted penny and 5 time heads) / P(5 time heads)

=(1/100)*(0.9)5 /0.036842 =0.160275

6 0
3 years ago
A researcher is investigating which of two newly developed automobile engine oils is better at prolonging the life of an engine.
Paraphin [41]

Answer:

idk pls help e on this tho!

Step-by-step explanation:

Barney has to run some errands around town. Look at the map below to calculate his distance if he starts at home, goes to the video store, then the grocery store, grabs a fast snack, and ends at home. How many units did he walk?

(4 points)

Group of answer choices

14 units

21 units

28 units

35 units

6 0
3 years ago
Factor completely. x^3-8x^2-2x+16
amm1812

Step-by-step explanation:

{x}^{3 }  - 8 {x}^{2}  - 2x + 16 \\  =  {x}^{2} (x - 8) - 2(x - 8) \\  = (x - 8)( {x}^{2}  - 2) \\  = (x - 8)( {x}^{2}  -  { \sqrt{2} }^{2} )  \\  = (x - 8)(x +  \sqrt{2} )(x -  \sqrt{2} )

8 0
4 years ago
What is the solution to this system of equations
Gelneren [198K]

Answer:

-1,2

Step-by-step explanation:

just round and estimate and get nearest

4 0
3 years ago
Read 2 more answers
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