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mariarad [96]
3 years ago
12

2 -6x + 5y = 1 6x + 4y = -10

Mathematics
1 answer:
Luba_88 [7]3 years ago
6 0

Answer:

(-1,-1)

Step-by-step explanation:

finding y

   -6x + 5y = 1

 + (6x + 4y = -10)

---------------------------

              9y = -9

                y = -1

finding x

-6x + 5(-1) = 1

-6x - 5 = 1

    + 5 = +5

-6x = 6

x= -1

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now, let's convert those mixed fractions to improper fractions and then subtract, bearing in mind our LCD will be 8.

\bf \stackrel{mixed}{4\frac{5}{8}}\implies \cfrac{4\cdot 8+5}{8}\implies \stackrel{improper}{\cfrac{45}{8}}~\hfill \stackrel{mixed}{3\frac{1}{2}}\implies \cfrac{3\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{7}{2}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{45}{8}-\cfrac{7}{2}\implies \stackrel{\textit{using the LCD of 8}}{\cfrac{(1)45~~-~~(4)7}{8}}\implies \cfrac{45-28}{8}\implies \cfrac{17}{8}\implies 2\frac{1}{8}

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Can you help with this I don’t know how to solve this.
Triss [41]

Answer:

arclength = 13.44 ft

Step-by-step explanation:

We are given PS = 28 feet, which is the length of the diameter.

The formula for arc length is  2\pi r\frac{x}{360}, where x is the degrees.

So, we need to find the radius. We know that the radius is half of the diameter, so:

\frac{28}{2}=14 ft

We also need to find ∠TXS. Since we know the diameter is a line that crosses the center point of the circle, we also know that ∠PXT and ∠TXS add up to 180°. So:

∠PXT + ∠TXS = 180

125 + ∠TXS = 180

∠TXS = 180 - 125

∠TXS = 55°

Now, we can use the arc length formula:

arclength=2\pi r\frac{x}{360}

arclength=2\pi (14)\frac{55}{360}

arclength=13.43903524...

arclength = 13.44 ft

Check my work to make sure! Hope this helps!

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3 years ago
Can someone please help me
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Answer:

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