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

Ayuda

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.