How do i solve 2x + 9 = 12

A certain vibrating system satisfies the equation u′′ + γu′ + u = 0. find the value of the damping coefficient γ for which the quasi period of the damped motion is 50% greater than the period of the corresponding undamped motion.

A box contains a red shirt, a blue shirt, a black trouser, and a red trouser. What is the probability of choosing the black trouser and the red shirt without replacement

What is 9m-3 (m+6) = 2 (m+1)

Two 6-sided dice are tossed simultaneously. what is the probability of the total being equal to 9? a. 1/9 b. 1/3 c. 1/5 d. 1/12

The product of an irrational number and an irrational number is an irrational number. A) Always true B) Sometimes true C) Never true

What is the distributive property of - 3 (8-b)

Zhen is an audiobook narrator. The table gives some completed audio lengths and the amount of time Zhen spends researching, recording, and editing the audiobook. Completed (hours) _ Working time (hours) 1 _ 6 1/2 3 1/2 _ 22 3/4 7 _ 45 1/2 10 _ 65

Eight algebra questions (explanations would be appreciated): Use substitution to solve the following: 1) y=x² y=x+2 2) y=x²+3 y=4x 3) x²+4y=1 y=x+1 4) x²-3y=-2 y=4+x 5) x²-2y=-4 y=6-x 6) x²+4y=9 y=x-3 7) x²+5y=16 y+x=2 8) y=x²-6x 3x-y=-10

Brenda is making bracelets that each use three 6 inch. strips of leather. she wants to make 6 bracelets. how many strips of leather does Brenda need.

0.75,1/2,0.4, and 1/5