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aliya0001 [1]
3 years ago
7

Solve the rational equation

Mathematics
2 answers:
joja [24]3 years ago
7 0

Answer:

the answer is x=2

hope this helped!!

nikdorinn [45]3 years ago
6 0

Answer:

C.) x = 2

Step-by-step explanation:

\frac{1}{x - 4}  =  \frac{7}{ {x}^{2}  + x - 20}  \\  \\  {x}^{2}  + x - 20 = 7x - 28 \\  {x}^{2}  + x - 7x = 20 - 28 \\  {x}^{2}  - 6x =  - 8 \\  {x}^{2}  - 6x + 8 = 0 \\  {x}^{2}  - 4x - 2x + 8 = 0 \\ x(x - 4) - 2(x - 4) = 0 \\ (x - 2)(x - 4) = 0 \\ x = 2 \:  \:  \:  \:  \: or \:  \:  \:  \: x = 4

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3 years ago
halfway through the fourth year , harrys collection contains 400 pennies. study the graph provided at the beginning of this acti
elixir [45]

Answer:

The coordinates of the point is (3,5 , 400)

Step-by-step explanation:

The question is incomplete as the graph is not given in the question. Lets complete the question first. I have attached the graph related to this question below.

We can see in the graph that x-axis represents the years while the y-axis represents the pennies collected by Harry.

We have to find the coordinates of the point where he is able to collect 400 pennies.

As y-axis represents pennies, and the point to be found is at 400 pennies, so the y-coordinates of the point is 400.

Harry collects 400 pennies when he is halfway through 4rth year, which means that he has been collecting for:

3 years + Half of 4rth year = 3.5 years.

As x-axis represents the year and the point to be found is at 3.5 years, so the x-coordinate of the point is 3.5.

So, the coordinates of the point is (3,5 , 400)

This point can be seen in the second graph

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Step-by-step explanation:

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