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Sholpan [36]
3 years ago
14

Write the equation and solve the problem. The length of a rectangle is four less than twice the width. If the perimeter is 34, f

ind the length and the width.
Mathematics
1 answer:
Tamiku [17]3 years ago
5 0

The formula of a perimeter of a rectangle:

P = 2(l + w)

We have P = 34 and l = 2w - 4.

Substitute:

2(2w - 4 + w) = 34

2(3w - 4) = 34       <em>use distributive property</em>

(2)(3w) + (2)(-4) = 34

6w - 8 = 34       <em>add 8 to both sides</em>

6w = 42      <em>divide both sides by 6</em>

w = 7

l = 2w - 4 → l = 2(7) - 4 = 14 - 4 = 10

<h3>Answer: the length = 10 and the width = 7.</h3>
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Answer:

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Step-by-step explanation:

using the formula, m= ( Y2 - Y1)/( X2-X1)

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3 years ago
Consider 8x2 - 48x = -104. Write the equation so that a = 1: x2 + -6 x = -13 Complete the square: x2 – 6x + 9 = –13 + 9 Factor t
ICE Princess25 [194]

Answer:

The roots of the polynomial are;

3 + 2i

and 3-2i

Step-by-step explanation:

Here, we want to solve the given polynomial using the completing the square method

We start by dividing through by 8

This will give;

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To complete the square, we simply divide the coefficient of x by 2 and square it

We have this as -6/2 = -3

square it;; = (-3)^2 = 9

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x^2 - 6x + 9 = -13 + 9

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or x = 3-2i

8 0
3 years ago
Read 2 more answers
Pls help i dont understand :( will give Brainliest + 25 Points
umka21 [38]
It’s D. 4 is the one next to X because that’s what is changing and -3 is the y intercept which comes after X
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4 years ago
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Write an equation of the line that passes through the point (3,2) and is
gulaghasi [49]

Answer:

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Step-by-step explanation:

Please let me know if you want me to write an explanation for my answer :)

4 0
3 years ago
How do you solve You earn 15n 15n dollars for mowing n lawns. How much do you earn for mowing one lawn? Seven lawns?
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Answer:

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Step-by-step explanation:

The question is about the direct ratio problem. Logically, you will earn more if you mow more lawn.

The scheme for this ratio is given below:

15 n_________n lawns

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When you mow 7 lawns, the scheme will be in this manner:

15 n__________n lawns

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x=\frac{15n*7}{n}=105

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8 0
4 years ago
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