Answer:
(0,10)
Step-by-step explanation:
Answer:
The pre-image is the point (0,11)
Step-by-step explanation:
we know that
The rule of the translation is equal to
pre-mage------> image
(x,y) -----> (x+1,y-4)
so
we have that
(x+1,y-4)=(1,7)
so
x+1=1 -----> x=1-1=0
y-4=7 ----> y=7+4=11
therefore
The pre-image is the point (0,11)
Additive Identity Property
Answer:
10.5
Step-by-step explanation:
there are 2 middle values when you have an even number of data items so you must take their average
(10+11)/2 = 21/2 = 10.5
Answer:
x = 20
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Using ΔAHC , then
∠ACH = 180 - (2x + 100) = 180 - 2x - 100 = 80 - 2x
∠ECD = ∠ACB ( vertical angles are congruent ), thus
∠ECD = ∠ACH + ∠HCB, that is
3x = 80 - 2x + x
3x = 80 - x ( add x to both sides )
4x = 80 ( divide both sides by 4 )
x = 20
