20 points which of the following must be true if segment cd is the perpendicular bisector of segment ab? a. segments cd and ab form a ninety degree angle b. segment ad is congruent to segment cd c. segment ab is the perpendicular bisector of triangle abc. d. angle c must be 60 degrees. e. the two smaller triangles are acute. f. point c is the circumcenter of the larger triangle.

b. astronomers

the image of (6, 9) under a dilation is (4, 6). the scale factor is

the correct answer is 1: 2

step-by-step explanation:

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step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is