VALOR NUMÉRICO DE UN POLINOMIO Realiza los siguientes ejercicios

1) 4X2 +15X -20Y = cuando x=3,y=2

2) 3X3 + 5X2 +16 = cuando x= 2

3) 1 a3 + b5 + 5 = cuando a=5yb=5

4) 11b3+ 22 b + 14 = cuando b=10

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Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

What are the solutions of the equation? 16x^2 + 24x + 5 = 5 a. 1/4, 5/4 b. -1/4, -5/4 c. -1/4, 5/4 d. 1/4 , -5/4

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics