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Contact [7]
3 years ago
8

What are the x- and y-intercepts of the graph of -7x + 4y = -14

Mathematics
2 answers:
vampirchik [111]3 years ago
8 0

The x and y intercepts of graph -7x + 4y = -14 are 2 and -3.5 respectively

<u>Solution:</u>

Given, line equation is – 7x + 4y = - 14 ⇒ (1)

We have to find x – intercept and y – intercept of given equation.

<em><u>Finding x-intercept:</u></em>

x – intercept is x value when line meets x axis. It is a point on the graph where y is zero

Then, y becomes 0, so put y = 0 in (1)

⇒ - 7x + 4(0) = - 14

⇒ - 7x = - 14

⇒ x = 2

So, x – intercept is 2

<em><u>Finding y-intercept:</u></em>

y – intercept is y value when line meets y axis. It is a point on the graph where x is zero

Then, x becomes 0, so put x = 0 in (1)

⇒ - 7(0) + 4y = - 14

⇒ 4y = - 14

⇒ y = -3.5

So, y – intercept is – 3.5

Hence, the x and y intercepts of line are 2 and -3.5 respectively

AlekseyPX3 years ago
6 0

Answer:

you can change x=0=>y=-7/2 or

y=0=> x=2

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You are running a fuel economy study. One of the cars you find is blue. It can travel 43 1/2 on 1 1/4 gallons of gasoline. Anoth
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3 years ago
Does there exist a di↵erentiable function g : [0, 1] R such that g'(x) = f(x) for all x 2 [0, 1]? Justify your answer
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Answer:

No; Because g'(0) ≠ g'(1), i.e. 0≠2, then this function is not differentiable for g:[0,1]→R

Step-by-step explanation:

Assuming:  the function is f(x)=x^{2} in [0,1]

And rewriting it for the sake of clarity:

Does there exist a differentiable function g : [0, 1] →R such that g'(x) = f(x) for all g(x)=x² ∈ [0, 1]? Justify your answer

1) A function is considered to be differentiable if, and only if  both derivatives (right and left ones) do exist and have the same value. In this case, for the Domain [0,1]:

g'(0)=g'(1)

2) Examining it, the Domain for this set is smaller than the Real Set, since it is [0,1]

The limit to the left

g(x)=x^{2}\\g'(x)=2x\\ g'(0)=2(0) \Rightarrow g'(0)=0

g(x)=x^{2}\\g'(x)=2x\\ g'(1)=2(1) \Rightarrow g'(1)=2

g'(x)=f(x) then g'(0)=f(0) and g'(1)=f(1)

3) Since g'(0) ≠ g'(1), i.e. 0≠2, then this function is not differentiable for g:[0,1]→R

Because this is the same as to calculate the limit from the left and right side, of g(x).

f'(c)=\lim_{x\rightarrow c}\left [\frac{f(b)-f(a)}{b-a} \right ]\\\\g'(0)=\lim_{x\rightarrow 0}\left [\frac{g(b)-g(a)}{b-a} \right ]\\\\g'(1)=\lim_{x\rightarrow 1}\left [\frac{g(b)-g(a)}{b-a} \right ]

This is what the Bilateral Theorem says:

\lim_{x\rightarrow c^{-}}f(x)=L\Leftrightarrow \lim_{x\rightarrow c^{+}}f(x)=L\:and\:\lim_{x\rightarrow c^{-}}f(x)=L

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4 years ago
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