The first equation is 
(Equation 1)
The second equation is
(Equation 2)
Putting the value of x from equation 1 in equation 2.
we get,


by simplifying the given equation,


Using discriminant formula,


Now the formula for solution 'x' of quadratic equation is given by:


Hence, these are the required solutions.
D is true!!
Hope this helped:)
Answer:
x = √149 km
Step-by-step explanation:
Pythagorean theorem
x^2 = 10^2 + 7^2
x^2 = 100 + 49
x^2 = 149
x = √149
First one costs $720, second costs $700 so the second one the<span> 1,000 dollar computer discounted to 30%</span>
Answer:
A line with a slope of 0 is horizontal, while a line with no slope is completely vertical.
Step-by-step explanation: