2 years ago

Solve the system of equations by graphing: y= -2x + 7 y= 2x -5

Mathematics

1 answer:

valentina_108 [34]2 years ago

4 0

Answer: If the question is asking for the point of intersection, it’d be (3,1).

Step-by-step explanation:

Both of the methods below are valid.

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Well I'm having troubles with something I have no idea what it is or how to do it. The problem is x^2 -18x+8=0. I only know how

Lubov Fominskaja [6]

Answer:

$x = \frac{-(-18) -\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 -2 \sqrt{73}}{2}= 9 -\sqrt{73}$

$x = \frac{-(-18) +\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 +2 \sqrt{73}}{2}= 9 +\sqrt{73}$

Step-by-step explanation:

We have the following equation:

$x^2 -18 x +8 =0$

We can use the quadratic formula given by:

$x = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}$

Where:

$a = 1 , b=-18, c =8$

And replacing we got:

$x = \frac{-(-18) -\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 -2 \sqrt{73}}{2}= 9 -\sqrt{73}$

$x = \frac{-(-18) +\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 +2 \sqrt{73}}{2}= 9 +\sqrt{73}$

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3 years ago

What is the area of triangle ABC

Fed [463]

The answer for this is B

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3 years ago

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I really need help pls!! It’s also due really soon!!

frutty [35]

Answer:

I would say that It down by 1 unit and to the left by 4 units

Step-by-step explanation:

I´m pretty sure that is the answer because I solved a similar question like it and I got it right.

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3 years ago

A neighborhood in Shiloh is building a treehouse. It has a rectangle floor of 6 ft by 4 ft. What is the area of the tree house f

Helen [10]

Answer:

Step-by-step explanation:

Shiloh is building a tree house

It's measurement is 6ft by 4ft

Therefore the area can be calculated as follows

= 6×4

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3 years ago

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nirvana33 [79]

Answer:

Part 1: 10, Part 2: 6

Step-by-step explanation:

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