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atroni [7]
3 years ago
15

I need help to better understand this worksheet...

Mathematics
1 answer:
Murrr4er [49]3 years ago
3 0

Answer:

When you have a equation such as

y = 2x + 4

This means, that whatever x equals, do the rest equation for y. They give you a table, the numbers under x, you replace x with the x in the equation. Multiply it next to the number. Do the rest of the equation, that is how you get y.

Once you do all x numbers, you have to graph it.

X = run

Y = rise

X is the horizontal line

Y is the vertical line

                                               |

                                               |

                                               |

                                               |

                                               

       ---------------------------------------------------------------------------|

                                               |

                                               |

                                               |

                                               |

Look at the middle, the x numbers that are to the right of the vertical line are negative.

The ones to the left are positive.

The numbers that are on the top of y are positive

The numbers that are on the bottom are negative.

Hope this helps!

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nika2105 [10]

Answer:

(x + y)² = 35

Step-by-step explanation:

The expansion of

(x + y)² = x² + 2xy + y²

           = x² + y² + 2xy ← substitute given values

          = 25 + 2(5)

           = 25 + 10

           = 35

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4 0
2 years ago
Allison and Megan were at track practice. The track is 3/8 kilometers around.
Ad libitum [116K]

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5 0
3 years ago
Determine the lengths of the sides of the rectangle using the given area. Give answers both exactly and
Degger [83]

Answer:

Part a) Exactly values

The width of the rectangle is \frac{\sqrt{70}}{2}\ cm

The length of the rectangle is 2\sqrt{70}\ cm

Part b) Approximately values

The width of the rectangle is 4.2\ cm

The length of the rectangle is 16.7\ cm

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The area of rectangle is equal to

A=LW

we have

L=4x\ cm\\W=x\ cm

substitute the values in the formula

A=4x(x)

A=4x^2

A=70\ cm^2

so

70=4x^2

Solve for x

Divide by 4 both sides

\frac{70}{4}=x^2

square root both sides

x=(+/-)\frac{\sqrt{70}}{2}

The solution is the positive value

x=\frac{\sqrt{70}}{2}

therefore

<em>Exactly values</em>

L=4\sqrt{70}}{2}=2\sqrt{70}\ cm\\\\W=\frac{\sqrt{70}}{2}\ cm

<em>Approximately values</em>

L=4\sqrt{70}}{2}=16.7\ cm\\\\W=\frac{\sqrt{70}}{2}=4.2\ cm

6 0
3 years ago
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