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Lena [83]
3 years ago
5

Help please im not sure

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
7 0

Answer:

<em>A linear pair is a pair of adjacent angles formed when two lines intersect.</em>

Step-by-step explanation:

option no. d because only these are the possible linear pairs

option no. d because only these are the possible linear pairs its according to me maybe wrong mark me brainliest

Lisa [10]3 years ago
4 0

Answer:

the first and last

Step-by-step explanation:

its correct

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Simplify your answer.<br><br><br> 9x 5/9
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Ava has been asked to create the advertising art for the school skating party. She is using paper that is 15.5 inches wide. The
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3 years ago
The length of a rectangle is 6 more than twice the width. if the area is 40 cm^2, find the length and breadth of the rectangle
ra1l [238]

Answer: 3.217 & 12.434

Step-by-step explanation:

If we use <em>w</em> to represent the width, the length will be 6 more than 2 times w.

Hence, the length is 2w+6.

The area of a rectangle would be its length times its width, so let's make an equation to represent it's area.

A=w(2w+6)

We can also substitute 40 in for A as it's given in the question.

40 = w(2w+6)

Distributing <em>w</em> by multiplying it by both terms in the parentheses, we get

40 = 2w^2+6w

We can make the equation simpler by dividing both sides by 2.

20 = w^2+3w

Subtracting both sides by 20 will make the left-hand side 0.

0=w^2+3w-20

Now that we have put this <em>quadratic equation</em> into standard form (ax²+bx+c), we can find its solutions using the quadratic formula.

For reference, the quadratic formula is

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

In this case, a is 1, b is 3, and c is -20.

Substituting, we get

w=\frac{-3\pm\sqrt{3^2-4(1)(-20)}}{2(1)}

w= \frac{-3\pm\sqrt{9+80}}{2}

w=\frac{-3+\sqrt{89}}{2}\hspace{0.1cm}or\hspace{0.1cm}\frac{-3-\sqrt{89}}{2}

Since the second solution results in a negative number, it cannot be the length of w.

w=\frac{-3+\sqrt{89}}{2}\approx3.217

The width/breadth of the rectangle is 3.217 cm.

To calculate the length, let's substitute the width into the expression for the length:

l=2(3.217)+6

l=12.434

The length of this rectangle is 12.434 cm.

6 0
2 years ago
for every 40 phone calls that jess made in a month, she recived 70 phone calls. What is the ratio in simplest form of the number
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4:7

40/10=4

70/10=7

:)

Hope this helped


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