Answer:
part A= x=1
part B= -13=-11 and -7=-7 and -2=-2
Step-by-step explanation:
part A
5+x-12=x-7
-7+x=x-7
x=1
part B
5+(-4)-12=-4-7
-1-12=-4-7
-13=-4-7
-13=-11
5+x-12=x-7
5+(-12)=-7
-7=-7
5+x-12=x-7
5+5-12=5-7
10-12=-2
-2=-2
Answer:
Step-by-step explanation
taco: góc FBC + góc FBA = 90° mà góc FBA + góc FAB = 90
⇒góc FAC = góc FBC mà góc FBC = góc EDC ⇒ góc FAC = góc EDF
xét Δ ABF và Δ DCE có
góc FAC = góc EDF
góc F = góc E = 90°
⇒ tam giác ABF đồng dạng với tam giác DCE
⇒ AB/DC = BF/EC ⇒ AB.EC = DC.BF mà AB = DC ⇒ EC=BF=4
Answer:
8
Step-by-step explanation:
12=2x-4
12+4 = 2x
16 = 2x
16/2 =x
x =8
check
d(x) = 2(8)-4
=16-4
=12
A rational number stops and can be turned into a fraction and doesn’t repeat while an irrational number does the opposite
