Answer:

Step-by-step explanation:
Answer: choice a
Step-by-step explanation:
The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side. Note: This rule must be satisfied for all 3 conditions of the sides.
so it has to be in between 9 and 5
7+2=9
2+x>7
--> x>5
however, it can't be 5 or 9
Hope this helps! <3
Answer:
5 Hours
Step-by-step explanation:
340 = 215 + 25x
DO INVERSE OPERATIONS ~ MINUS BOTH SIDES OF THE = SIGN
340 - 215 = 125
215 - 215 = 0
125 = 25x
DIVIDE BOTH SIDE NOW
125 / 25 = 5
25x / 25 = 1 = x
<em>5 Hours</em>
Answer:
There are two possibilities:
and 
and 
Step-by-step explanation:
Mathematically speaking, the statement is equivalent to this 2-variable non-linear system:


First,
is cleared in the first equation:

Now, the variable is substituted in the second one:

And some algebra is done in order to simplify the expression:


Roots are found by means of the General Equation for Second-Order Polynomials:
and 
There are two different values for
:






There are two possibilities:
and 
and 