Given that y varies jointly as x and z find the value of x when constant of variation is 2, y=16 and z=10

(2x^4+5x^3+3x^2+8x+12)÷(2x+3) what is the answer?

Simplify.1. 2-(x + 3)2. 3x + 3(x-5)3. (2x-7) + (-3x - 6)4. 2 (x-10) + 4x -85. 3(4x)- 7(4-5x)6. 3x - 5y - 3(6y) + 5(2x)7. 13y - (y-11) + 178. (15+3y)2 - 14y​

Aprofessor grades students 5 test, a project and a final examination . each tests counts as 10% course grades. the project counts as 20% of the course grades. the final examination counts as 30% of the course grades. samantha has test score of 70,65,82,94 and 85. samantha's project score is 92. her final examination is 80. use the weighted mean formula tp find samantha's average for rhe course. hint: the sum of all weight is 100% = 1 . what is the mean ,median and mode of thos question​