Answer:
The dilation scale factor is
.
Step-by-step explanation:
The image is the dilated form of its preimage if and only if the following conditions are observed:
1) 
2) 
3) 
4) 
5) 
If we know that
,
,
,
,
,
,
and
, then the coefficients are, respectively:
,
,
, 
As
, we conclude that the dilation scale factor applied in the preimage is equal to
.
4 < 5 < 12
4 is less than 5 is less than 12
4/
1
< 5/
1
< 12/
1
(5x-18)+(4x+7)=180
5x+4x=180+18-7
9x=191
x=191/9
Answer: x=191/9
To evaluate this function, we use the calculator. We change the setting to radian first because we are using pi and thensimply input the cosine of 7 pi over 8. Then we square the answer. <span>We expect this number to be less than 1. </span>The function value is 0.8536.
15·x²=15·x so
x²=x
x·x=x with x≠0 than x must be 1
x=1