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Sav [38]
2 years ago
6

Original price: $32 discount: 16% sale price: ?

Mathematics
2 answers:
Svetllana [295]2 years ago
7 0

Answer:

£26.88

Step-by-step explanation:

16% of £32 = £5.12

 32.00

- 05.12

-------------

  26.00

Keith_Richards [23]2 years ago
7 0
26:88 .....................
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A mattress store sells only king, queen and twin-size mattresses. Sales records at the store indicate that the number of queen-s
Nitella [24]

Answer:

The probability that the next mattress sold is either king or queen-size is P=0.8.

Step-by-step explanation:

We have 3 types of matress: queen size (Q), king size (K) and twin size (T).

We will treat the probability as the proportion (or relative frequency) of sales of each type of matress.

We know that the number of queen-size mattresses sold is one-fourth the number of king and twin-size mattresses combined. This can be expressed as:

P_Q=\dfrac{P_K+P_T}{4}\\\\\\4P_Q-P_K-P_T=0

We also know that three times as many king-size mattresses are sold as twin-size mattresses. We can express that as:

P_K=3P_T\\\\P_K-3P_T=0

Finally, we know that the sum of probablities has to be 1, or 100%.

P_Q+P_K+P_T=1

We can solve this by sustitution:

P_K=3P_T\\\\4P_Q=P_K+P_T=3P_T+P_T=4P_T\\\\P_Q=P_T\\\\\\P_Q+P_K+P_T=1\\\\P_T+3P_T+P_T=1\\\\5P_T=1\\\\P_T=0.2\\\\\\P_Q=P_T=0.2\\\\P_K=3P_T=3\cdot0.2=0.6

Now we know the probabilities of each of the matress types.

The probability that the next matress sold is either king or queen-size is:

P_K+P_Q=0.6+0.2=0.8

8 0
3 years ago
PLEASE HELP <br> What is the volume, in cubic m, of a cube with an edge length of 14m?
Lera25 [3.4K]

Answer:

v = 2744 m³

Step-by-step explanation:

Volume of cube

= length³

= l³

= 14³

= 2744 m³

make as the brainliest

5 0
3 years ago
Which of the following accurately lists all the discontinuities for the graph below
Mila [183]
The correct answer is option B.

From the graph we can see the following discontinuities:
a) A hole at x = -2
b) A jump at x = 0
c) A hole at x = 8

The hole refers to the point discontinuity and the jump refers to as jump discontinuity. The function is defined and is continuous at x = 3

Thus, the given graph has jump discontinuity  at x = 0 and point discontinuity at x = -2 and x = 8
6 0
2 years ago
Read 2 more answers
Express the following complex number in trigonometric form: 3 - 3i and find the 4th roots.
Sonja [21]

Answer:

z=3\sqrt{2}\left(\cos\dfrac{7\pi}{4}+i\sin\dfrac{7\pi}{4}\right)

z_1=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{7\pi}{16}+i\sin\dfrac{7\pi}{16}\right).

z_2=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{15\pi}{16}+i\sin\dfrac{15\pi}{16}\right).

z_3=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{23\pi}{16}+i\sin\dfrac{23\pi}{16}\right).

z_4=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{31\pi}{16}+i\sin\dfrac{31\pi}{16}\right).

Step-by-step explanation:

The complex number z=3-3i has the real part Re\ z=3 and the imaginary part Im\ z=-3.

Hence,

|z|=\sqrt{(Re\ z)^2+(Im\ z)^2}=\sqrt{3^2+(-3)^2}=\sqrt{9+9}=3\sqrt{2},\\ \\\cos \varphi=\dfrac{Re\ z}{|z|}=\dfrac{3}{3\sqrt{2}}=\dfrac{\sqrt{2}}{2},\\ \\\sin \varphi=\dfrac{Im\ z}{|z|}=\dfrac{-3}{3\sqrt{2}}=-\dfrac{\sqrt{2}}{2}.

From the last two equalities, \varphi =\dfrac{7\pi}{4} and the trigonometric form is

z=|z|(\cos\varphi+i\sin\varphi)=3\sqrt{2}\left(\cos\dfrac{7\pi}{4}+i\sin\dfrac{7\pi}{4}\right).

The square roots can be calculated using the formula:

\sqrt[4]{z}=\left\{\sqrt[4]{|z|}\left(\cos\dfrac{\varphi+2\pi k}{4}+i\sin\dfrac{\varphi+2\pi k}{4}\right),\text{ where }k=0,1,2,3\right\}.

At k=0:

z_1=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{\frac{7\pi}{4}}{4}+i\sin\dfrac{\frac{7\pi}{4}}{4}\right)=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{7\pi}{16}+i\sin\dfrac{7\pi}{16}\right).

At k=1:

z_2=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{\frac{7\pi}{4}+2\pi}{4}+i\sin\dfrac{\frac{7\pi}{4}+2\pi}{4}\right)=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{15\pi}{16}+i\sin\dfrac{15\pi}{16}\right).

At k=2:

z_3=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{\frac{7\pi}{4}+4\pi}{4}+i\sin\dfrac{\frac{7\pi}{4}+4\pi}{4}\right)=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{23\pi}{16}+i\sin\dfrac{23\pi}{16}\right).

At k=3:

z_4=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{\frac{7\pi}{4}+6\pi}{4}+i\sin\dfrac{\frac{7\pi}{4}+6\pi}{4}\right)=\sqrt[4]{3\sqrt{2}}\left(\cos\dfrac{31\pi}{16}+i\sin\dfrac{31\pi}{16}\right).

3 0
3 years ago
Someone help and please make sure the answer is right! :)
TEA [102]

Answer:

84

Step-by-step explanation:

180-51-45=84

I think this would be the answer since triangles add up to be 84 and we are just finding the last missing angle.

hope this helps :)

8 0
2 years ago
Read 2 more answers
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