Make an equation
X+X+200=1500
Isolate the variable
2x=1300
X=650
Know that we know what X is, we know that X + 200 will equal the cost of the second appliance
650+850=1500
Answer: 
Step-by-step explanation:
By the geometric mean theorem,

So, by the Pythagorean theorem,

Answer:
Multiply the second equation by 2
Step-by-step explanation:
Given


Required
Get matching coefficient for elimination


The coefficient of x in both expressions are factors.
So, we can multiply the second equation by 2 to get the coefficient of x in the first.
i.e.


So, the system becomes:


<em>Now, x can be eliminated</em>
Answer:
Henry has a best record for the number of shots made.
Step-by-step explanation:
It is provided that Henry made 0.45 or 45% of his shots.
And Trevor missed 58% of his shots, i.e. Trevor made 42% of his shots.
There is no information about Allison's and Arthur's probability of making the shot.
So, only based upon Henry and Trevor, it can be seen clearly that Henry has a best record for the number of shots made.
s= 18
and,
t= 48
These values makes it correct.