Question

Xy-7x+6y-42 якщо х=-5 у=12.2

Answer 1

Ху-7х+6у-42 = -5*12,2-7*(-5)+6*12,2-42 = -61+35+73,2-42 = 5,2

Answer 2

To evaluate the expression "Xy-7x+6y-42" when x = -5 and y = 12.2, simply substitute the given values into the expression and perform the calculations.

Xy-7x+6y-42

Step 1: Substitute x = -5 and y = 12.2 into the expression: (-5 * 12.2) - (7 * -5) + (6 * 12.2) - 42

Step 2: Perform the arithmetic operations: (-61) - (-35) + (73.2) - 42

Step 3: Continue the calculations: -61 + 35 + 73.2 - 42

Step 4: Sum up the remaining numbers: 5 + 73.2 - 42

Step 5: Final calculation: 78.2 - 42 = 36.2

So, when x = -5 and y = 12.2, the value of the expression "Xy-7x+6y-42" is 36.2.