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____ [38]
3 years ago
11

For khan:) 2x + 5y > -6 - 4x + 3y = 2 Is (-1,7) a solution of the system?

Mathematics
1 answer:
KiRa [710]3 years ago
3 0

Step-by-step explanation:

let \: 2x + 5y >  - 6 ... i  \\  - 4x + 3y = 2 ...ii\\ let \: x =  - 1 \\ y = 7\\ from \: i \: equation \\ 2x + 5y >  - 6 \\ then \: keeping \: value \: of \: x \: and \: y \\ 2 \times  - 1 + 5 \times 7  >  - 6 \\  - 2 + 35 >  - 6 \\ 33 >  - 6 \\ from \: ii \: equation \\  - 4x + 3y = 2 \\  - 4 \times  - 1 + 3 \times 7 = 2 \\ 4 + 21 = 25

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Given f(x)=cos c and g(x)=cot x, what are the domain and range of f(g(x))?
ololo11 [35]

Answer:

Alternative C is the correct answer

Step-by-step explanation:

The first step is to determine the composite function;

f[g(x)]

f[g(x)]=cos[cot(x)]

We then employ a graphing utility to determine the range and the domain of the new function.

The range is the set of y-values for which the function is defined. In this case it is;

[-1,1]

On the other hand, the domain refers to the set of the x-values for which the function is real and defined. In this case; it is the set of real numbers x except x does not equal npi for all integers n.

8 0
3 years ago
A 17.2 gallon gasoline tank is 1/2 full. How many gallons will it take to fill the tank?
love history [14]

Answer:

8.6

Step-by-step explanation:

We know that the tank is filled halfway, and it can hold 17.2 gallons, so we can just divide to figure out how much is half the tank (the amount we need to fill it)

17.2 / 2 = 8.6

We can check our work by multiplying

8.6 x 2 = 17.2

So it would take 8.6gal to fill it up. I hope this helps :)

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3 years ago
What is the answer for x6 - x over 4y when x equals -4 and y equa bl ls 4
andrey2020 [161]

Answer:

-1.75

Step-by-step explanation:

I just plugged in the values.

Hope this is right and helps! :)

8 0
3 years ago
What is the solution to the system of linear equations graphed below?
olganol [36]

Answer: (3\frac{1}{2}, -4)

Step-by-step explanation:

The solution to the graph of a system of equations is where they intercept. Here, it is at about (3\frac{1}{2}, -4).

3 0
3 years ago
Read 2 more answers
20 points<br> How on Earth am I supposed to do this
goblinko [34]

Answer: -89

Step-by-step explanation:

So your equation is

- 9(a) - 7(x) - 9(c) - 9(b) - 7(y)

You know that (a) (b) and (c) = -1

You also know that (x) and (y) = 7

So, when you put this into the equation, it will look like this:

- 9(-1) - 7(7) - 9(-1) - 9(-1) - 7(7)

When you work that out you will get left with your answer, which is -89.

HOPE THIS HELPS!!!

3 0
3 years ago
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