Question

7,8у+8,42у-2у,если у=100

Answer 1

7,8у+8,42у-2у=у(7,8+8,42-2)=14,22у            если у=100 то 14,22*100=1422

Answer 2

7,8*100+8.42*100-2*100=780+842-200=1422

Answer 3

To evaluate the expression, substitute the value of у with 100 and perform the calculations.

7,8у + 8,42у - 2у

Replacing у with 100:

7,8 * 100 + 8,42 * 100 - 2 * 100

Simplifying:

780 + 842 - 200

1622 - 200

The result is:

1422