Answer:
12
Step-by-step explanation:
she has 3 brothers times 4 toys.
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
(-10)>(-5)>(-0.11)>(1/4), so (-1/2)*(-0.5) is the largest
Answer:
<u> </u><u>1</u><u>9</u><u> </u>
Step-by-step explanation:
=> 12 - (-7)
=> 12 + 7
=<u> </u><u>1</u><u>9</u><u> </u>
Answer:
$288.8
Step-by-step explanation:
Using I=Prt, we know that the 3000 is the P, 5.5% is the r, and 21 months is the t. The t goes by years, so 21 months=1.75 years. To find the interest, we do 3000*5.5%*1.75 which is 288.75. Then the problem requires you to round to the nearest tenth, so now, the answer is $288.8