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3 years ago

I don't know how to

Mathematics

1 answer:

aliina [53]3 years ago

7 0

Substitute x values into y= -x and plot them. So when x = -1 then y= -(-1) which is 1.

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Can someone help me with this simple math problem, you can easily get points if you know the answer correctly. Also I will mark

Mekhanik [1.2K]

Answer:

RATIONAL

Step-by-step explanation:

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3 years ago

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Solve for x. Assume that segments that appear to be tangent are tangent. Round your final answer to the nearest tenth, if necess

Butoxors [25]

Answer:

x= 16.6

Step-by-step explanation:

The circle is unnecessary. You can just use Pythag Theorem

9^2+14^2= c^2

81 + 196 = 277

square root 277

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16.6

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3 years ago

If f(x)= 5x, what is f^-1(x)?

Helen [10]

Step-by-step explanation:

$f( x) {}^{ - 1} \\ f(x) = 5x \\ y = 5x \\ x = 5y \\ y = \frac{x}{5} \\ f(x) {}^{ - 1} = \frac{x}{5}$

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2 years ago

Determine the next step for solving the quadratic equation by completing the square

GaryK [48]

Answer:

The two solutions are: $x=\frac{1}{2}+/-\frac{\sqrt{7} }{2}$

The next and every step are below.

Explanation:

1. $-3=-2x^2+2x$ : Given (addition property / add - 3 to both sides)

2. $-3 = - 2(x^2-x)$ : Given (commom factor - 2)

3. $-3-1/2=-2(x^2-x+1/4)$

To obtain the perfect square it was added the square of half of the coefficient of x: (1/2)² = 1/4, inside the parenthesis.

Since, the terms inside the parentthesis are multiplied by - 2, you have to add - 2 (1/4) = - 1/2 to the left side of the equation.

4. Now, you have that the trinomial x² - x + 1/4 is a square perfect trinomial which is factored as (x - 1/2)² and get the expression:

$-7/2=-2(x-1/2)^2$

5. Divide both sides by - 2 to get the next expression:

$-7/4=(x-1/2)^2$

6. The last step is to extract squere root from both sides of the equality:

$(x-1/2)=+/-\sqrt{\frac{7}{4}}\\ \\ x-1/2=+/-\frac{\sqrt{7} }{2}\\ \\ x=\frac{1}{2}+/-\frac{\sqrt{7} }{2}$

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3 years ago

The output is seven more than the input

charle [14.2K]

Y = x - 7

or

f(x) = x - 7

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3 years ago

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