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stiks02 [169]
3 years ago
15

Anyone knows how to do 4a)

Mathematics
2 answers:
Olin [163]3 years ago
8 0

Sure.  Brainly just made me an Ace.

Let's plug in 1/x as the independent and xy as the dependent in point slope form:

xy = m (\frac 1 x) + b = \frac m x + b

We have two points (1/x,xy)=(-4,-2) and (1/x,xy)=(3,5)

That's a slope

m = \dfrac{5- -2}{3 - -4} = 1

So a y intercept

5 = 3 + b

b = 2

xy = \dfrac 1 x + 2 = \dfrac{2x + 1}{x}

That's easy to solve for y:

y =\dfrac{2x+1}{x^2}

When x=1 that's

y = \dfrac{2+1}{1} = 3

QveST [7]3 years ago
6 0
 just use the slope form and replace digits with x and y
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Answer:

I will create a five by four matrix to indicate the costs of the products.  The matrix will have five vertical columns and four horizontal rolls.  The vertical columns will show the product categories and the total costs for all the products and decorations.  The horizontal rolls will show the product costs, the decoration costs, and the total costs for each product category.

The size and shape of the matrix will be 5 by 4 with squared boxes.

Step-by-step explanation:

Products/Costs         Hats         Cards      Teddy    Total Costs

Product costs           $2.50       $0.90       $3.10        $6.50

Decoration costs      $1.50       $0.60        $1.70        $3.80

Total costs               $4.00        $1.50       $4.80       $10.30

6 0
3 years ago
The desert temperature, H, oscillates daily between 30ºF at 4am and 70ºF at 4pm. Write a possible formula for H in terms of t, m
densk [106]
<span>The find step is to find C which is the vertical shift. This is the average between the maximum and minimum. So its 30+70=100/2= 50. the amplitude (A) take the average of the difference between max. temp. and min. value So 70-30= 40/2= 20, but it becomes -20 because the graph is shifted up 50 degrees and decreases to 30 at 4a.m. Then the period is 2pi/B which is 2pi/24, which equals pi/12. A=-20 B= pi/12 C=50</span>
5 0
3 years ago
What is the value of a <br><br> A. 27.5<br> B. 45<br> C. 50<br> D. 90
kiruha [24]

Answer:


Step-by-step explanation:

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8 0
4 years ago
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HELP ME WITH MY MATH ASSIGNMENT, WILL GIVE ANYTHING, DUE TOMORROW! :(
nataly862011 [7]

Answer:

Answer is 225.

We have to find the sum of 15 terms of the series

sigma 1 to 15 (2n-1)

This can be split as per summation terms as

sigma 2n - sigma 1

sigma 2n can again be simplified by taking 2 outside

sigma 2n= 2 times sum of natural numbers of 1 to 15

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sigma 1= 1+1+...15 times= 15

Hence final answer is

= 2 times sigma n - (n) = 240-15 = 225.

Step-by-step explanation:


4 0
3 years ago
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What is the difference between the exact simple interest and the ordinary simple interest on a 200-day loan of 5,000 at 12%
77julia77 [94]

Answer:

  4.56

Step-by-step explanation:

"Ordinary" interest will be more than "exact" interest because the number of days in a year is a smaller value. The difference will be ...

  Io = Prt = 5000(0.12)(200/360) = 333.33

  Ie = Prt = 5000(0.12)(200/365) = 328.77

The difference is ...

  333.33 -328.77 = 4.56 . . . the difference in interest values

_____

<em>Additional comment</em>

The question asks for the difference between exact and ordinary interest, so the result is technically negative:

  328.77 -333.33 = -4.56

6 0
3 years ago
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