Answer:
for 18 x is 6 and for 20 it is 11
Step-by-step explanation:
For 18, since -1+2x and 5+x is the same thing, set up and equation. WE can simplify to -1+x=5 and then we get x=6
For 20, 18 is 11 since 18=-4+2x. If we simplify we get 22=2x then we can use algebra to say that x=11
Hope this helps :)
Answer:
someone will be with you in a moment
Step-by-step explanation:
The answer is: A. 20.3
The explanation is shown below:
1. By definition, the sum of the length of the strings (The length of the blue segment and the length of the red segment) is equal to the length of the major axis (The black segment).
2. Based on this, you can write the following expression, where 
is the length of the blue segment:
3. Now, you must solve for , as following:
4. Therefore, the answer is the option A.
Ah hah ! This is exactly what I was telling you about in the other answer.
A pair of angles that are formed by 2 lines and DON't share a side are called
"vertical angles", and a pair of vertical angles are always equal.
In this problem, the two angles on the sides facing each other are vertical angles, and that tells you that they're equal.
So you can immediately write <u> 4y - 8 = 79 + y </u>,
and then you can easily solve that and find the value of 'y' .
