Answer:
(x + 11 ) * ( x - 11)
Step-by-step explanation:
The expression:
x² - 121
is a difference of squares
We notice that √x² = x and √121 = 11
Then
( x² - 121 ) = ( x + 11 ) * ( x - 11 )
If we multiply
( x + 11 ) * ( x - 11 ) = x*x - 11*x + 11*x - (11)*(11)
( x + 11 ) * ( x - 11 ) = x² - 121
That is what we want to probe
Answer: 
Step-by-step explanation:
Since, By the given diagram,
In quadrilateral ABCD, all angles are right angles ⇒ DC = AB = 15 cm and CB = DA
Also, In triangle DFA,
⇒ 
⇒ 
⇒ 
Now, In triangle, DEC,
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
Answer:
1/4
Step-by-step explanation:
Skateboards : wheels
12 : 48
Divide each part by 12
12/12 : 48/12
1 :4
Answer:
D,A
Step-by-step explanation:
a. 1.15
b. 6.20 divided by 4 = 1.55
c. 5 divided by 4 = 1.25
d. 5.50 divided by 5 = 1.1
D is correct
