- Multiply (2x+7)(x+8)?

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Dilute bacteriophage for plating 10^-6.You mix .1ml of the bacteriophage with .3ml of bacteria.u get 55pfu.What is final concen phage stock? A balloon contains 125.0ml of hydrogen at 631 mm Hg at 36 degrees Celsius. What is the volume of the gas at 417 m Hg and 31 degrees celcius? A 6.0 mL balloon contains He at 19.0 degrees Celsius. What volume will it occupy at 38.0 degrees Celsius.? Algebra: Solve for x using only Cramer's Rule. 3x+y-2z=-3
2x+7y+3z=9
4x-3y-z=7 Please help!? Please help: If train A and B are 500 miles apart and A left at 8am at 50mph and B left at 8:30 at 55mph. When will they meet? Thank you!!?