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Paraphin [41]
3 years ago
15

What are the coordinates of point S"? (negative three-halves, nine-halves) (negative nine-halves, fifteen-halves) (nine-halves,

negative three-halves) (negative fifteen-halves, 0)
Mathematics
1 answer:
kow [346]3 years ago
5 0

Answer:

S=(\frac{9}{2},-\frac{3}{2})

Step-by-step explanation:

The missing details are:

T= (0,4)

M = (\frac{9}{4}, \frac{5}{4}) --- Midpoint of ST

Required

Determine the coordinates of S

To do this, we apply the mid-point formula:

M(x,y) = \frac{1}{2}(x_1+x_2,y_1+y_2)

Where

M(x,y) =  (\frac{9}{4}, \frac{5}{4})

T(x_1,y_1) - (0,4)

The equation becomes:

M(x,y) = \frac{1}{2}(x_1+x_2,y_1+y_2)

(\frac{9}{4},\frac{5}{4}) = \frac{1}{2}(0+x_2,4+y_2)

(\frac{9}{4},\frac{5}{4}) = \frac{1}{2}(x_2,4+y_2)

Multiply through by 2

2*(\frac{9}{4},\frac{5}{4}) = 2*\frac{1}{2}(x_2,4+y_2)

(\frac{9}{2},\frac{5}{2}) = (x_2,4+y_2)

By comparison:

x_2 = \frac{9}{2}

4 + y_2 =\frac{5}{2}

y_2 =\frac{5}{2}-4

y_2 =\frac{5-8}{2}

y_2 =-\frac{3}{2}

Hence, the coordinates of S is:

S=(\frac{9}{2},-\frac{3}{2})

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