the ratio of red marbles to yellow marbles is 3 to 8 if there is a total of 946 marbles in the bag how many marbles are yellow

Could someone with number 1 and 2

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Which inequalities can be used to find the solution set of the following inequality? check all that apply. |2x – 5| (2x – 5) (2x + 5) –(2x – 5) –(2x + 5)