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3 years ago

Can anyone help me pls

Mathematics

1 answer:

Nikitich [7]3 years ago

3 0

9514 1404 393

Answer:

A. some values (x = 4)

B. all values

C. no values

Step-by-step explanation:

If you subtract the right-side expression from both sides of an equation, so you get something of the form ...

f(x) = 0

Then there are three possibilities:

f(x) is some function of x . . . . "some values" make it true*

f(x) = 0 . . . . "all values" make it true; the equation is an identity

f(x) = constant (non-zero) . . . . "no values" of x will make it true

___

A: 3x = x +8

3x -(x +8) = 0

2x -8 = 0 . . . . . . . . true for "some" values of x, namely, x = 4

B: 5x -(x +x +x +x +x) = 0

0 = 0 . . . . . . . . . . . true for "all" values of x

C: 2(x +5) -(2x +5) = 0

2x + 10 -2x -5 = 0

5 = 0 . . . . . . . . . . . true for "no values" of x (always FALSE)

_____

* The possibility exists that the function f(x) does not have 0 in its range. In that case, there are no real solutions for the equation. For example |x|+1 = 0 has no solutions. For expressions linear in x, there will always be a solution.

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8_murik_8 [283]

Answer:

Step-by-step explanation:

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3 years ago

Y = 2x + 5 Whats the answer for this? Whats the missing value (2,__)

Anna35 [415]

Answer:

(-5/2, 5)

Step-by-step explanation:

Apply x-y intercepts theorem

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then substitutes.

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3 years ago

Find the vertex and length of the latus rectum for the parabola. y=1/6(x-8)^2+6

Ivan

Step-by-step explanation:

If the parabola has the form

$y = a(x - h)^2 + k$ (vertex form)

then its vertex is located at the point (h, k). Therefore, the vertex of the parabola

$y = \dfrac{1}{6}(x - 8)^2 + 6$

is located at the point (8, 6).

To find the length of the parabola's latus rectum, we need to find its focal length f. Luckily, since our equation is in vertex form, we can easily find from the focus (or focal point) coordinate, which is

$\text{focus} = (h, k +\frac{1}{4a})$

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$f = \dfrac{1}{4(\frac{1}{6})} = \dfrac{3}{2}$

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3 years ago

What is the slope of a line that is perpendicular to the line whose equation is 7x−3y=10?

Sonja [21]

Since this equation is already in standard form, there is no need to convert it. Standard form is Ax + By = C. In this equation, 7 = A, 3 = B, and 10 = C. From standard form, Ax + By = C equals negative A over B.

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↓

$\displaystyle\ m= \frac{-7}{-3}$

Then you'd simplify.

$\displaystyle\ m=\frac{7}{3}$

The slope cannot be simplified any more, so this would be the final answer.

- Marlon Nunez

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3 years ago