9x-20=7
9x=27
x=3
Hope that helps you :)
Answer:
x < 1
Step-by-step explanation:
an open circle means it contains no equal signs.....everything to the left is shaded....means it is less then
x < 1 (thats a less then sign only) ....no equal sign in there
Answer:
There is needed around 311 balloons to fulfill Mr. Schordine’s dream of flight.
Step-by-step explanation:
First, we need to calculate the volume of each balloon by considering the balloons as a sphere:

Where:
r: is the radius = 0.4 meters

Knowing that 1 m³ of helium is able to lift about 1 kg, that Mr. Schordine weights 84 kg, and that each ballon has 0.27 m³ of helium, the number of balloons needed are:
Therefore, there is needed around 311 balloons to fulfill Mr. Schordine’s dream of flight.
I hope it helps you!
Inequalities are used to represent unequal expressions
The solution to the inequality is: 
<h3>How to determine the inequality solution</h3>
The inequality is given as:
60>5(6-2x)
Rewrite the inequality properly as:

Divide both sides of the inequality by 5

Subtract 6 from both sides of the inequality

Divide both sides of the inequality by -2
![-3Rewrite the inequality as[tex]x > -3](https://tex.z-dn.net/?f=-3%3C%2Fp%3E%3Cp%3ERewrite%20the%20%3Cstrong%3Einequality%3C%2Fstrong%3E%20as%3C%2Fp%3E%3Cp%3E%5Btex%5Dx%20%3E%20-3)
Hence, the solution to the inequality is: 
Read more about inequalities at:
brainly.com/question/11234618
The third one is correct so it would be C.
Just substitute X and Y into the question.