Question 4 of 10 In order to solve the following system of equations by subtraction, which of
the following could you do before subtracting the equations so that one
variable will be eliminated when you subtract them?
4x - 2v=7
3.x – 3y=15
A. Multiply the top equation by 3 and the bottom equation by 4.
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B. Multiply the top equation by-3 and the bottom equation by 2.
C. Multiply the top equation by 1/3.
D. Multiply the top equation by 15 and the bottom equation by 7.

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

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

180

step-by-step explanation:

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.