Answers

2015-09-02T21:38:22+08:00
10 and 30
10x30=300
10+30= 40
1 5 1
how?
how did you come up with 10 and 30?
  • Brainly User
2015-09-02T22:31:01+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
X + y = 40
In terms of x:
     x + y = 40
    y = 40 - x
 
Let first number = x
       second number = 40-x
       product of the two numbers = 300

Equation
     (x) (40-x) = 300
    40x - x² = 300

Equate to zero:
   -x² + 40x - 300 = 0

Solve by factoring:
  -(x-10) (x-30) = 0

-x + 10 = 0            x - 30 = 0
- x = -10                x = 30
  x = 10

The two numbers are:
If x = 10
Then the two numbers are:
    first number x = 10
    second number  (40-10) = 30

If x = 30
Then the two numbers are:
    first number = 30
   second number (x-30) = 10

Even if interchanged, the two numbers are 10 and 30 

To check:
  10 + 30 = 40
  (10) (30) = 300
0
thank you! :)
You're welcome, Kisseyofficial