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
Answer:

Step-by-step explanation:
Given
![y = \sqrt[3] x](https://tex.z-dn.net/?f=y%20%3D%20%5Csqrt%5B3%5D%20x)
Required
Determine the average rate of change over [2,7]
This is calculated as:

In this case:
and 
So, we have:


From the table:
f(7) = 1.91
f(2) = 1.26



Answer: It can be either one.
x=−3
or
x=−5
Answer:
Step-by-step explanation:
ALL YOU HAVE TO 19 - 1 THIRD AND THAT GIVES THE AWNSER TO PLUG INTO THE PROBLEM