Answer:
912.9 miles total
Step-by-step explanation:
75.4 miles biking x 8 times = 603.2 miles in biking
22.4 miles running x 3 days = 67.2 miles in running
27.5 miles running x 5 days = 137.5 miles running (2nd)
15 miles swimming x 7 days = 105 miles swimming
603.2+67.2+137.5+105 =
912.9 miles total
C. Y = 3/10x + 1/2
....................
<span>A) 2x - 4y = 10
B) 7x - 9y = 12
Multiplying equation A by -3.5
A) -7x +14y = -35 then adding B
B) </span><span><span>7x - 9y = 12</span>
5y = -23
y = -4.6
</span>
2x -4*-4.6 = 10
2x + 18.4 = 10
2x = -8.4
x = -4.2
It has one solution (-4.2, -4.6)
The original price of the car would be $17,040 brand new
hope this helps
The quadratic equation that best represents his model of the relationship between stock value and time is given by:

The graph is given at the end of the answer.
<h3>What is the equation of a parabola given it’s vertex?</h3>
The equation of a quadratic function, of vertex (h,k), is given by:

In which a is the leading coefficient.
In this problem, the maximum value was a share value of $18 after 10 days, hence the vertex is:
(h,k) = (10,18).
Thus:

Since the initial price was of $8 per share, we have that:




Hence the equation is:

At the end of the answer, the sketch of the graph is given.
More can be learned about quadratic equations at brainly.com/question/24737967