4 × ? = 100
? = 100 : 4
? = <u>25</u>
Answer:
Option D.
Jenn's answer is not correct. She got it substituting
into the equation and solving for "x".
Step-by-step explanation:
Given the following equation:

Since you need that
, you hace to substitute that value into the equation:

Now you need to solve for "c":

Therefore for a a value of
, you get 
Then, the you can identify that the correct answer is the one given in the Option D.
Jenn made a mistake, because she substituted
into the equation and then solve for "x":
Answer:
m∠BXC = 70°.
We start out with m∠XBC. It is 55°, because it is a corresponding angle with ∠AXY.
Since ∠XBC and ∠XCB are the base angles of an isosceles triangle, they are congruent. This means that m∠XCB = 55°.
To find the measure of ∠BXC, we find the sum of the two base angles in the isosceles triangle and subtract it from 180:
180-(55+55) = 180-110 = 70°
Step-by-step explanation:
Answer:
C=2πr=2·π·41≈257.6106
Step-by-step explanation: