Evaluate the expression when a=5 and b= -5. -a +8b

-45

Step-by-step explanation:

Substitute the variables.

a = 5

b = -5

-a + 8b

-5 + 8(-5)

-5 + -40

-45

(Some people may not appreciate the irrelevant graphic you've added.)

i don't even know man. edge inuity be messing with us. i had to ask a question too.

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

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