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4 years ago

Which is the equation of a line perpendicular to the line with the equation 3x+4y=7?

Mathematics

2 answers:

nexus9112 [7]4 years ago

8 0

Answer: It's B.) 4x - 3y = 5

Blizzard [7]4 years ago

6 0

The answer should be B)4x-3y=5

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Where do the equations y=2x and y=<img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" id="TexFormula1" title=" x^{2} " alt=" x^

never [62]

Set 2x=x²-3 to each other.
Subtract 2x from both sides and get the following

x²-3-2x

Rearranging the formula to make factoring easier, we get
x²-2x-3

Factor and you should get the following:
(x-3)(x+1)

set both equal to 0 and solve for x.

x-3=0⇒x=3
x+1=0⇒x=-1

Now plug both of these values back into one of your original equations to get your y-values. It does not matter which equation you plug your xs back into due to the fact they intersect at the same x, and thus will also intersect at the same y.

For times sake,
y=2x
plug in x=3 and get y=6
plug in x=-1 and get y=-2

Ergo, the equations y=2x and y=x²-3 intersect at
(3,6) and (-1,-2)

8 0

3 years ago

The mean of the data set is 40 and one standard deviation is 5. About what percent of the numbers fall between 35 and 50?

Nataly [62]

Answer:

The correct option is D. 81.8%

Step-by-step explanation:

Mean of the data set is given to be 40

⇒ μ = 40

Standard deviation of the data set is given to be 5

⇒ σ = 5

Now we are supposed to find out what percent of the numbers fall between 35 and 50

$\implies z =\frac{x-\mu}{\sigma}$

Now for P(35 < x < 50) :

Substitute x = 35 ⇒ z = -1

Substitute x = 50 ⇒ z = 2

So, P(-1 < z < 2) = P(z < 2) - P(z < -1)

⇒ P(-1 < z < 2) = 0.9772 - 0.1587

⇒ P(-1 < z < 2) = 0.8185

⇒ P(-1 < z < 2) = 81.8%

Therefore, 81.8% percent of the numbers fall between 35 and 50

Hence, The correct option is D. 81.8%

8 0

4 years ago

Given that f(x) = x2 + 3x + 6 and g(x) = the quantity of x minus three, over two, solve for f(g(x)) when x = 1.

o-na [289]

I believe it is -1 I hope I helped! :)

4 0

3 years ago

Adeline must read 126 page book in 4.5 days she wants to read the same number of pages each day how many pages does she need to

expeople1 [14]

Answer:

28 pages per day

Step-by-step explanation:

126 divided by 4.5 = 28

I hope this helps :3

8 0

3 years ago

What does it mean? ??

yaroslaw [1]

This is a multiply like this..for example

8 0

4 years ago