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Setler [38]
4 years ago
13

SOMEBODY PLEASE HELP ME SOLVE THIS!!

Mathematics
1 answer:
Alex777 [14]4 years ago
8 0

Answer:

Step-by-step explanation:

74

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See attached photo!! PLEASE ANSWER THIS ASAP!! THANKS IN ADVANCE! CORRECT ANSWER ONLY!!
Kruka [31]

Answer:

  10. Statement: Point P lies on line C'D'. Reason: The coordinates of P satisfy the equation of line C'D'.

Step-by-step explanation:

The equation for line C'D' in statement 8 appears to be in error. It should be ...

  y=\dfrac{-s}{2t-r}x+\dfrac{2st}{2t-r}

The coordinates of point P given in statement 9 are in error (they cannot be negative). They should be ...

  P = (2/3(r+t), 2/3s) . . . . . without the minus signs

This point will satisfy the equation of line C'D'. Here is the algebra. (Notice we have multiplied each term on the right of the above equation by (-1/-1).

  y=\dfrac{s}{r-2t}x-\dfrac{2st}{r-2t}\\\\\dfrac{2}{3}s=\dfrac{s}{r-2t}\cdot\dfrac{2}{3}(r+t)-\dfrac{2st}{r-2t}\qquad\text{substitute P for (x, y)}\\\\s(r-2t)=s(r+t)-3st\qquad\text{multiply by $\frac{3}{2}$(r-2t)}\\\\sr-2st=sr-2st\qquad\text{P satisfies the equation for line C'D'}

So, step 10 should say, in effect, P lies on C'D'.

_____

<em>Comment on the proof</em>

IMO it is unfortunate that this proof has so many mistakes. Properly done, it is a nice demonstration that the medians are concurrent. It also demonstrates that the location of the centroid is 1/3 of the distance along the median toward the vertex.

6 0
4 years ago
Read 2 more answers
What does y + x &gt; 2 equal too? Solve for y
Contact [7]
Y equals 4 hope i could help
4 0
4 years ago
Helppp this is my math test <br><br> Which model is 85% shaded?
Anettt [7]

Answer:

Model 1 represents 85% shaded area.

Step-by-step explanation:

Here, each model consists of equal sized rectangles.

Please refer to attached figure to know the model number.

Model 2 (on top right of question figure) contains a total of 20 such rectangles out of which 13 are shaded. As per formula of percentage:

\text{Percentage of shaded area} = \dfrac{\text{Number of shaded rectangles}}{\text{Total number of rectangles}} \times 100\\\Rightarrow \dfrac{13}{20}\times 100 = 65\%

Model 3 (on bottom left of question figure) contains a total of 16 such rectangles out of which 10 are shaded. As per formula of percentage:

\text{Percentage of shaded area} = \dfrac{10}{16}\times 100 = 62.5\%

Model 4 (on bottom right of question figure) contains a total of 16 such rectangles out of which 13 are shaded. As per formula of percentage:

\text{Percentage of shaded area} = \dfrac{13}{16}\times 100 = 81.25\%

Model 1 (on top left of question figure) contains a total of 20 such rectangles out of which 17 are shaded. As per formula of percentage:

\text{Percentage of shaded area} = \dfrac{17}{20}\times 100 = 85\%

Hence, model 1 is the correct answer.

3 0
3 years ago
H(n) = 3n - 5; Find h(-9)
marissa [1.9K]

h(n)=3n-5\Longrightarrow h(-9)=3(-9)-5=-27-5=\boxed{-32}

Hope this helps.

6 0
4 years ago
Read 2 more answers
Write an expression for the sequence of operations described below.
natita [175]

Answer:

n^6-m

Step-by-step explanation:

ACCORDING TO QUEDTION 1 ST NO IS N

AND 2 ND NO. IS M

N RAISED TO POWER 6=N^6

AND THE M SUBTRACTED FROM N^6=N^6 -M

6 0
3 years ago
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