The sum of two numbers is 25 and their difference is 13. Find their product.

solve it

Step-by-step explanation:

X+X=25-13

114

Step-by-step explanation:

Let x+y=25

Let x-y=13

Let's isolate one variable

x-y=13 can be re-written as x=13+y

Now that we isolated x we can replace it in the other equation

(x)+y=25

(13+y) +y=25

13 +2y=25

-13           -13

2y=12

12/2=6

We know that y=6

Let's replace y with 6 to find x

x+(y)=25

x+6=25

-6        -6

x=19

The goal of this problem was to find the product of x and y so now we have to multiply them

19*6=114

Your answer is 114

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

it is probably the graph on the bottom right.