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Bess [88]
3 years ago
5

Point C is the Image of C (-4,-2) under a Reflection across the x-axis.

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
8 0

Step-by-step explanation:

\text {Reflection Rule for across the X-axis: } (x,y) \rightarrow (x,-y)

Using the point C (-4,-2) and the refection rule:

(-4,-2) \rightarrow(-4, 2)

\text {C' should be (-4,2)}

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A TV is 16 inches tall and 14 inches wide. Calculate the screen's diagonal length. Round to the nearest whole number.
telo118 [61]

Answer:

21

Step-by-step explanation:

You were close to de answer but you rounded in a wrong way

If we calculate <em>\sqrt{16^{2} + 14^{2}}  </em>we get<em> 21.2602916255</em>

We need to round to the nearest whole number, it means that we have we only have two options: 21 or 22

We need to remember the rounding rules:

  • If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up
  • If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down

We see that 1 is followed by 2, it means that we have to round the number down, so our answer is 21

8 0
3 years ago
Find the equation of the line that is perpendicular to the given line and passes through the given point. Enter the right side o
disa [49]

Let\\\\k:y=m_1x+b_1\\\\l:y=m_2x+b_2\\\\l\ \perp\ k\iff m_1m_2=-1\\\\\text{We have}\ k:y=\dfrac{3x-12}{2}=\dfrac{3x}{2}-\dfrac{12}{2}=\dfrac{3}{2}x-6\to m_1=\dfrac{3}{2}\\\\l:y=mx+b\to\dfrac{3}{2}m=-1\qquad|\cdot\dfrac{2}{3}\\\\m=-\dfrac{2}{3}\\\\l:y=-\dfrac{2}{3}x+b\\\\\text{Put the coordinates of the point (9, 9) to the equation of the line}\ l:\\\\9=-\dfrac{2}{3}(9)+b\\\\9=-2(9)+b\\\\9=-18+b\qquad|+18\\\\b=27\\\\y=-\dfrac{2}{3}x+27\to y=-\dfrac{2x}{3}+\dfrac{27\cdot3}{3}\to\boxed{y=\dfrac{-2x+81}{3}}

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3 years ago
Actually never mind i dont need help on this
kolbaska11 [484]
Wait do you need help or no
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3 years ago
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ser-zykov [4K]

Hello User!

Correction "Math"

Answer: 12 4/7

6 0
3 years ago
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