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3 years ago

The price of an item has been reduced by 40 %. The original price was $82 .

Mathematics

2 answers:

FromTheMoon [43]3 years ago

6 0

Answer: 49.2

Step-by-step explanation:

Mariana [72]3 years ago

4 0

Answer:

49.2

Step-by-step explanation:

82*.6

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In the month of June, the temperature in Johannesburg, South Africa, varies over the day in a periodic way that can be modeled a

Art [367]

Answer:

The answer is " $\bold{T = - 7.5 \cos \frac{\pi}{12}( t - 4 )+ 10.5}$ "

Step-by-step explanation:

Given value:

Temp-maximum= $18^{\circ}$

Temp. minimum = $3^{\circ}$

It is halfway between 10 am and 10 pm to 4 am.

The sinus and cosine roles could be used throughout the year to predict fluctuations in climate models. Its type of formula that can be used to model such information is:

$T = A \cos B(t-C) + D,$ where parameters are A, B , C, D, T is the ° C temperature and t is the time (1-24)

$A = amplitude = \frac{(T_{max} - T_{min})}{2}\\\\$

$= \frac{(3 - 18)}{2}\\\\= - \frac{15}{2}\\\\ = -7.5$

$B = \frac{2 \pi}{24}\\\\$

$= \frac{\pi}{12}$

$C = \text{ units translated to the right}= 4$

$D = y_{min} + amplitude = units \ translated \ up\\\\$

D = 7.5 + 3 = 10.5

Its trigonometric function equation that model temperature T hours after midnight in Johannesburg t.

$T = - 7.5 \cos \frac{\pi}{12}( t - 4 )+ 10.5$

6 0

3 years ago

Which inequality is graphed below

Aneli [31]

Answer:

Step-by-step explanation:

> is a dotted line and the area above it is shaded

< is a dotted line and the area below it is shades

≥ is solid line with the area above shaded

≤ is a solid line with the area below it shaded

The graph shows characteristics of ≥, and C is the only answer with ≥ in it

6 0

3 years ago

4+ (-3) - 2*(-6)<br> What is the answer to

konstantin123 [22]

Answer:

Step-by-step explanation:

4+(-3)-2*(-6)

4-3-2*-6

1-(-12)

1+12

4 0

3 years ago

Read 2 more answers

Find the value of x.

Tatiana [17]

$\large \mathfrak{Solution : }$

The given pair of angles are vertical opposite angle pair so, they are equal. i.e

$(x + 90)\degree = 4x\degree$

$(4x - x) \degree= 90\degree$

$3x\degree = 90\degree$

$x\degree = \dfrac{90\degree}{3\degree}$

$x\degree = 30\degree$

8 0

3 years ago

Read 2 more answers

Question 10 of 10 Which of the binomials below is a factor of this trinomial? x² + 3x - 4 O A. X+8 O B. x² + 4 O c. x-4 O D. X+4

ollegr [7]

Step-by-step explanation:

Since x² + 3x - 4 = (x + 4)(x - 1), the correct answer is D.

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3 years ago