Question

1. Some equations are solved on the basis of a certain
system. Find the correct answer for the unsolved
equation on that basis.
5 U 3 = -7;3 U 7= - 11; 7 U 11 = ?
(a) 18
(b) – 59
(c) 77
(d) - 15
​

Answer 1

Answer:

b) -59

Step-by-step explanation:

Let the numbers be x and y,

Then:

x U y = (x + y) - (x*y)

Example:

5 U 3 = (5 + 3) - (5 * 3) = 8 - 15 = -7

3 U 7 = (3 + 7) - (3 * 7) = 10 - 21 = -11

Therefore,

7 U 11 = (7 + 11) - (7 * 11) = 18 - 77 = -59

The answer is at B) -59

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