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Advocard [28]
3 years ago
13

This is Physical Science questions, can someone please help with 7-9 !!!!

Mathematics
1 answer:
Olin [163]3 years ago
8 0

stop spamming. its not funny and will make people avoid it


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Find the slope of the graph of the function y=5x/x-2 at (3,15). Then find an equation for the line tangent to the graph at that
bagirrra123 [75]
The first derivative gives you the formula for the slope of the tangent line to the curve at a given point.

<span>Find the first derivative of the function y=5x/x-2:
       
               (x-2)(5) - (5x)(1)
dy/dx = ------------------------
                     (x-2)^2

simplify the algebra here.
  
                                                      (3-2)(5) - (15)(1)
Then, at the point (3,15), dy/dx = -------------------------- = -10
                                                          (3-2)^2

What is the equation of the tangent line?  In other words, what is the eqn of the tan line to the given curve at when x = 3, if the slope is -10?

     y-15 = -10(x-3)

This can be re-written in other forms if desired.

</span>
5 0
3 years ago
John and his family went out to eat at their favorite restaurant. The bill for the food was $65.00 and they left 20% tip for the
kondaur [170]

Method 1

65 +  20%  tip = Total cost

so we need 20% of 65

0.2 times 65 = 13

65 + 13 = $78 total cost  


Method 2

65 is 100%

meal cost 120%  (with 20% tip)

65 Times 1.2 = 78

4 0
3 years ago
Simplify this equation into the lowest fraction
snow_tiger [21]
(1/x.y  - 1/y²) ÷ (1/x².y - 1/x.y²) 

(1 - x.y)/x.y   ÷ (x - y)/x.y

[(1 - x.y)/x.y].[x.y/(x - y)]

(1 - x.y)/(x- y)

6 0
4 years ago
If r is ten more than the square root of l, then r =
alekssr [168]

Answer:The answer is D I just took the test.

Step-by-step explanation: D

7 0
4 years ago
Given w= sqrt2 (cos ( pi / 4 ) + i sin ( pi / 4 ) ) and z = 2 (cos ( pi / 2 ) + I sin ( pi /2 ) ) , what is w – z expressed in p
Yuliya22 [10]

w = √2 (cos(π/4) + i sin(π/4)) = √2 (1/√2 + i/√2) = 1 + i

z = 2 (cos(π/2) + i sin(π/2)) = 2i

Then

w - z = (1 + i) - 2i = 1 - i

so that

|w - z| = √(1² + (-1)²) = √2

and

arg(w - z) = -π/4

In polar form, we have

w - z = √2 (cos(-π/4) + i sin(-π/4)) = √2 (cos(π/4) - i sin(π/4))

5 0
3 years ago
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