Simplify 5+4
(3+4÷(11-7))

the answer is 81

Step-by-step explanation:

5+4(3+4÷(11-7))

This is BODMAS rule

so, first complete the brackets B

so, 5+4(3+4(4))

     = 5+4(3+16)

     5+4 x 19

      = 5+ 76

      = 81

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6