What is the constant of proportionality in the equation x/y = 2/g?

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost