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yKpoI14uk [10]
2 years ago
9

Una funzione inversamente proporzionale è rappresentata da?

Mathematics
1 answer:
puteri [66]2 years ago
3 0
Supponiamo che due variabili x e y siano inversamente proporzionali; allora possiamo rappresentarli come x ∝ 1 / y. Ciò significa che se il valore di x aumenta, il valore di y diminuisce e viceversa.


Suppose two variables x and y are inversely proportional; then we can represent them as x ∝ 1/y. That means, if the value of x increases, then the value of y decreases and vice versa.

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Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2. -2 8 -8 2
AVprozaik [17]
The slope formula is the difference of the y values over the difference in the x values.  We have a slope, so we will fill in the formula with what we have and then solve for x: -2= \frac{9-5}{x-10}.  Multiply both sides by x-10 to get rid of the fraction.  -2(x-10) = 4.  Distribute to get -2x+20=4 and -2x = -16.  That gives us an x value of 8.
5 0
3 years ago
Ellen purchased a dishwasher, which cost $315 before the 9.22% sales tax. She used the machine an average of 10 times per week f
Natasha2012 [34]
Given:
Cost of dishwasher : 315 before sales tax
sales tax : 9.22%

Total cost = 315 * 1.0922 = 344.043

Average of 10 uses per week for the next 6 years before replacing it.
There are 52 weeks in a year.

10 uses per week * 52 weeks per year * 6 years = 3120 average uses

cost for water = 0.09 ; cost for electricity = 0.13 ; total cost per use = 0.22

0.22 * 3120 = 686.40 cost of use

purchase cost =    344.043
cost of use      =    <u>686.40</u>
lifetime cost     1,030.443
5 0
3 years ago
Read 2 more answers
I have been stuck on the problem for so long. please help me:
Xelga [282]

Answer:

D-2

Step-by-step explanation:

You can use elimination to get the value of y. Move numbers to one side and x and ys to the other side. To use elimination, multiply the first equation with 2. You will get 2x+2y=24. add it with the equation below. y will be eliminated and you will get the value of x. X=10. Plug in x and get the y value. Y=2

6 0
2 years ago
Natalie paid $20.7 for 3 small pizzas and a salad which was $3.
zysi [14]
20.70=3p+3
17.70=3p
$5.90=p
So if you only needed the equation to describe the word problem it is
$20.70=3p+3

If you want to know how much each pizza was it is $5.90; salad $3.00
6 0
3 years ago
A car travels down a highway at 25 m/s. An observer stands 150 m from the highway.
makvit [3.9K]
Let x be the distance (in feet) along the road that the car has traveled and h be the distance (in feet) between the car and the observer.

(a) Before the car passes the observer, we have dh/dt < 0; after it passes, we have dh/dt > 0. So at the instant it passes the observer we have dh/dt = 0, given that dh/dt varies continuously since the car travels at a constant velocity.
8 0
2 years ago
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