Question

Calcule o valor numérico das a expressões sendo X=6 Y=7

A)X.y

B)X.Y + X-Y

C)Y+X.X+4y​

Answer 1

a) 6.7

42

b) 6.7+6-7

42+(-1)

42-1

41

c) 7+6.6+4.7

7+36+28

43+28

71

Answer 2

a)

$xy = 6 \times 7 \\ xy = 42$

b)

$xy + x - y = 42 + 6 - 7 \\ xy + x - y = 41$

c)

$y + {x }^{2} + 4y = 7 + 36 + 4 \times 7 \\ y + {x}^{2} + 4y = 71$