Write an algebraic expression for each verbal expression. Then simplify, indicating the properties used.
31. twice the sum of s and t decreased by s
32. 5 times the product of x and y increased by 3xy
33. the product of 6 and the square of z, increased by the sum of 7, z2, and 6
34. 6 times the sum of x and y squared minus 3 times the sum of x and
y squared

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

the k side

step-by-step explanation:

plese mark mde brainliest!

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

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the answer is y = 11.54

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