Please please please help! Fast

Mathematics

1 answer:

Zanzabum3 years ago

7 0

2nd and 3rd ones! :)

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HELP ME AS FAST AS POSSIBLE! 95 POINTS!!!

Likurg_2 [28]

Answer:

Step-by-step explanation:

4 (x - 7) - 2 (x + 1) = 10

x = 10

B. -2 (x - 7) + (x + 1) = 5

x = 10

your equation is equivalent to B!

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3 years ago

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3 years ago

In the system of equations, which variable would it be easiest to solve for?

Digiron [165]

Answer:

The easiest way of solving this is to eliminate one of the variables. If you multiply each of the equations by a number so you can add the equations together and have only one variable left, you can solve the single variable equation. Try multiplying the first equation by 11, the second by -10 and adding them, thus eliminating the y variable. After this, substitute that value you have for x and solve for y. I hope this helps.

Step-by-step explanation:

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3 years ago

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On a coordinate plane, rectangle 1 has points (1, negative 2), (4, negative 2), (4, negative 3), (1, negative 3). Rectangle 2 ha

Sophie [7]

Rectangle 2 is the image of rectangle 1 after it rotates 90 degrees clockwise.

<h3>How to determine the degree of rotation?</h3>

The given parameters are:

<u>Rectangle 1</u>

(1, -2), (4,-2), (4,-3) and (1, -3)

<u>Rectangle 2</u>

(-3, -1), (-2,-1), (-2, -4,) and (-3, -4)

By comparing the coordinates, we can see that the rule of transformation is:

(x,y) ⇒ (y,-x)

The above rule represents a 90° clockwise rotation

Hence, rectangle 2 is the image of rectangle 1 after it rotates 90 degrees clockwise.