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ki77a [65]
3 years ago
15

8th Grade

Mathematics
1 answer:
Eddi Din [679]3 years ago
8 0

Answer: The second and third options are the equations with x=3

Step-by-step explanation:

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Please help with this question!!
xxMikexx [17]

\text{Let}\ k:y=m_1x+b_1\ \text{and}\ l:y=m_2x+b_2\\\\l\perp k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\\text{We have the points J(-24, -4) and K(-4, 6)}.\\\\\text{The formula of a slope:}\\\\m=\dfrac{y_2-y_1}{x_2-x_1}\\\\\text{substitute:}\\\\m_1=\dfrac{6-(-4)}{-4-(-24)}=\dfrac{10}{20}=\dfrac{1}{2}\\\\\text{therefore}\ m_2=-\dfrac{1}{\frac{1}{2}}=-2\\\\\text{The formula of a midpoint:}\\\\\left(\dfrac{x_1+x_2}{2};\ \dfrac{y_1+y_2}{2}\right)\\\\\text{substitute the coordinates of the points J and K:}

x=\dfrac{-24+(-4)}{2}=\dfrac{-28}{2}=-14\\\\y=\dfrac{-4+6}{2}=\dfrac{2}{2}=1\\\\\text{midpoint}\ (-14,\ 1)\\\\\text{The point-slope form:}\\\\y-y_1=m(x-x_1)\\\\\text{substitute}\ m=-2,\ x_1=-14\ \text{and}\ y_1=1:\\\\y-1=-2(x-(-14))\\\\\boxed{y-1=-2(x+14)}

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3 years ago
Which graph fits y=2x+1?
alekssr [168]

Answer:

C

Step-by-step explanation:

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3 years ago
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Explain how to solve this problem.
Leya [2.2K]
The answer is A. <span>Work backward. 
Hong started talking with her friends at 10:10. 
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3 years ago
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Help please! I’m stuck on this one and idk what to do first!
DaniilM [7]

Answer:

10 miles

Step-by-step explanation:

This is a right triangle. This is know because of the little square in the corner that indicates a right angle. Therefore, the Pythagorean Theorem can be used.

a^2+b^2=c^2

where a and b are the legs and c is the hypotenuse.

In this triangle, 24 and x are the legs, because they form the right angle. 26 is the hypotenuse because it is opposite the right angle.

x^2+24^2=26^2

Evaluate the exponents

x^2+576=676

Now, solve for x. First, move 576 to the other side of the equation by subtracting 576 from both sides.

x^2+576-576=676-576

x^2=100

Now, x is being squared. Take the square root of both sides.

√x^2=√100

x=√100

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Use appropriate units

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The missing side length is 10 miles.

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Answer: umm sorry i just do not understand this question is it a trick for points?

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