If a scientist mixed 20% saline solution with 70% saline solution to get 10 gallons of 30% saline solution, how many gallons of 20% and 70% solutions were mixed?

I know something that can help you, you should do proportions

first anwser choice.

step-by-step explanation:

the greater/less or equal to symbol (> or < with the line at the bottom) is a closed/filled in circle.

when multiplying or dividing by a negative on both sides you have to flip the inequality sign. this rule only applies to multiplying or dividing by a negative number in inequality equations. this rule is really important.

-5c + 2 _< _27

subtract from both sides by 2

-5c _< _ 27

divide both sides by -5

c _< _ 5.4

flip the inequality sign

c _> _5.4

the only possible answer that would match the simplified inequality is the first answer choice

The answers 5 so there’s the you need trust me it’s right