<em>n = 4</em>
- <em>Step-by-step explanation:</em>
<em>Hi there !</em>
<em>²⁾2n + n/2 = ²⁾10</em>
<em>4n + n = 20</em>
<em>5n = 20</em>
<em>n = 20 : 5</em>
<em>n = 4</em>
<em>Good luck !</em>
Answer:
<em>Their masses are 100 kg and 90 kg</em>
Step-by-step explanation:
<u>Equations</u>
We'll solve the problem by setting only one variable. Let's call:
x = weight of the heavier boxer
Since the sum of the masses of both boxers is 190 Kg:
190 - x = mass of the lighter boxer.
It's given that
of the mass of the heavier boxer is 10 kg less than the mass of the other, thus:

Operating:

Multiplying by 5:


Simplifying:


The heavier boxer's mass is 100 kg. The lighter boxer has a mass of 190-100 = 90 kg.
Their masses are 100 kg and 90 kg
Answer:
The answer is A.
Step-by-step explanation:
A. 3*(-9)= -27, 4*(-9)= -36, -27-(-36)= 9
B. 3*(-27)= -81, 4*(-9)= -36, -81- (-36) = -45
C. 3*3= 9, 4*9= 36, 9-36= -27
D. 3*(-3)= -9, 4*(-6)= -24, -9-(-24)= 15
I think your answer might be 19.5