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Archy [21]
2 years ago
10

3.) Charlie bought a pair of shorts at a store that was having a 30% off sale. If the regular

Mathematics
1 answer:
scoundrel [369]2 years ago
6 0
It is £21 but I have to be 20 characters long to post this comment but that’s the answer
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Let the positive numbers a, b, c. Prove that <img src="https://tex.z-dn.net/?f=%5Cfrac%7Ba%5E%7B2013%7D%2Bb%5E%7B2013%7D%2Bc%5E%
Serggg [28]

Answer:

I don't need to prove it, I already believe you

7 0
2 years ago
Factorise the following quadratic expressions;<br> 6a-18a<br>21x -3x²<br>1/16 - p²<br>25v²-1<br>​
Lubov Fominskaja [6]

Answer:

− 12 a

3 x ( 7 − x )

( 1 4 + p ) ( 1 4 − p )

( 5 v + 1 ) ( 5 v − 1 )

Step-by-step explanation:

I think these are the right answers

3 0
2 years ago
Suppose that a restaurant chain claims that its bottles of ketchup contain 24 ounces of ketchup on average, with a standard devi
Tanya [424]

Answer:

Confidence Interval = (23.776, 24.224)

Step-by-step explanation:

Restaurant chain claims that its bottles of ketchup contain 24 ounces of ketchup on average.

⇒ Mean = 24 ounces.

Standard Deviation = 0.8

Number of bottles used for sample = 49

⇒ n = 49

Confidence level = 95%

Corresponding z value with 95% confidence level = 1.96

Now, confidence interval is given by the following expression :

Mean \pm z^*\times \frac{\sigma}{\sqrt{n}}\\\\=24\pm1.96\times \frac{0.8}{\sqrt{49}}\\\\=24\pm 0.224

Hence, Confidence Interval = (23.776, 24.224)

6 0
3 years ago
The price of a cd was decreased by 20% to £7.68. What was the price before the decrease?
love history [14]

Answer:

£9.6

Step-by-step explanation:

x = the original price of a CD

£x = 100% of the original price

The price of a CD was decreased by 20% to £7.68.

This means:

£7.68 = 100% - 20%

£7.68 = 80% of the original price

From this, we will find 1% of the original price.

£7.68 ÷ 80 = 1%

£0.096 = 1%

Since the original price ( x ) = 100% of the original price, we will find 100% of the original price.

£0.096 × 100 = 100%

£9.6 = 100%

Therefore, the original price of a CD = £9.6

8 0
3 years ago
I’ve never really understood range
Oduvanchick [21]

Answer:

( -∞, 3]

Step-by-step explanation:

Range is all possible y values that the graph covers.

So in this graph the legs extend all the way to y value  -∞ (never mind the x value). However, the top is at y=3 and the graph is not extending above that. Hence the range is from  -∞ to and including 3.

8 0
3 years ago
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