The sum of two numbers is 3, their difference is -15. Find the numbers.

Mathematics

2 answers:

inessss [21]3 years ago

6 0

X+y=3
x-y=-15
2x=-12
x=-6
y=-6+15=9

Karolina [17]3 years ago

4 0

Let, the numbers = x, y
So, x + y = 3
x - y = -15
x = -15 + y

Now, substitute the value of x in 1st equation,
-15 + y + y = 3
2y = 3 + 15
y = 18/2
y = 9

Now, substitute the value of y in equation 2nd,
x = -15 + 9
x = -6

In short, Your Numbers are 9 and -6

Hope this helps!

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Consider the solution to the system of inequalities below.

Kay [80]

Answer: y<2

Step-by-step explanation:

Since we can say a functions could be added to the system without changing the solution set if after including it to the system the feasible region of entire system is not affected.

Here, the solution to the system of inequalities is,

y≤ 0.5x+2

y>3x-3

Since after ploting these two enequslties in the graph we get our feasible region.

When we include y > 2 in the system there is no solution of the system.

Therefore it affects the system.

Now when we include y < 2 in the system the solution or feasible region remain same.

Therefore it does not affect the system.

When we include y > 3 in the system there is no solution of the system.

Therefore it affects the system.

When we include line y=3 in the system then the system has no solution.

Therefore, it affects the system.