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3 years ago

Select whether the equation has a solution or not.

Mathematics

1 answer:

Stolb23 [73]3 years ago

7 0

This equation has no solution

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F(x) = x + 6 , find the ordered pair when x = -2.

ss7ja [257]

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Answer: $\textsf{Option A, (-2, 4)}$

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Given: $\textsf{f(x) = x + 6}$

Find: $\textsf{f(-2)}$

Solution: We need to plug in the value -2 into every variable x that we have in the expression and simplify to get the solution.

Plug in the values

$\textsf{f(x) = x + 6}$

$\textsf{f(-2) = -2 + 6}$

Simplify

$\textsf{f(-2) = -2 + 6}$

$\textsf{f(-2) = 4}$

Therefore, the ordered pair that would match would have a x-coordinate of -2 and a y-coordinate of 4 producing (-2, 4) which matches option A.

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2 years ago

Which of the following lines would be perpendicular to a line who’s equation is

andrezito [222]

The answer would be y=-2x-13

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3 years ago

I need helpppppppppppp

Marat540 [252]

Answer:

1) 22

2) 1/98

Step-by-step explanation:

1) Use the equation (x-7)=15.

2) Use the equation 1/14 * 2/14.

- Hope this helps.

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4 years ago

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Someone please help me I’ll give out brainliest please dont answer if you don’t know

Mashcka [7]

Answer:

6.1 ⋅ $10^{3}$

Step-by-step explanation:

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3 years ago

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Pipe A can fill a tank in 5 hours. Pipe B can fill it in 2 hours less time than it takes pipe C, a draining pipe, to empty the t

sukhopar [10]

Answer: Time taken by pipe C to empty the tank = 5 hours.

Step-by-step explanation:

Pipe A can fill a tank in 5 hours.

Let time taken by Pipe C = x ( hours)

Time taken by Pipe B = x-2 ( hours)

Now, with all 3 pipes open, it takes 3 hours to fill the tank, it can be represented as

$\dfrac15+\dfrac1{x-2}-\dfrac1x=\dfrac 13\\\\\Rightarrow\ \dfrac{x-(x-2)}{x(x-2)}=\dfrac13-\dfrac15\\\\\Rightarrow\ \dfrac{x-x+2}{x^2-2x}=\dfrac{5-3}{15}\\\\\Rightarrow \dfrac{2}{x^2-2x}=\dfrac2{15}\\\\\Rightarrow\ x^2-2x=15\\\\\Rightarrow\ x^2-2x-15=0\\\\\Rightarrrow\ x^2-5x+3x-15=0\\\\\Rightarrow\ x(x-5)+3(x-5)=0\\\\\Rightarrow\ (x-5)(x+3)=0\\\\\Rightarrow\ x=5, -3$

Time cannot be negative,

So, x=5

Thus, Time taken by pipe C to empty the tank = 5 hours.

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3 years ago