On the first Day of his trip, he drove for 11 hours and traveled 693 miles. At what unit rate did he travel, in miles per hour?
1 answer:
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Let the line segment BD be x, then sin A = x/15
or, x = 15sinA
Also
The last option
or, x = 15sinA
Also
The last option
The three roots of x^3 + 7x^2 + 12x = 0 is 0,-3 and -4
<u>Solution:</u>
We have been given a cubic polynomial.
We need to find the three roots of the given polynomial.
Since it is a cubic polynomial, we can start by taking ‘x’ common from the equation.
This gives us:
----- eqn 1
So, from the above eq1 we can find the first root of the polynomial, which will be:
x = 0
Now, we need to find the remaining two roots which are taken from the remaining part of the equation which is:
we have to use the quadratic equation to solve this polynomial. The quadratic formula is:
Now, a = 1, b = 7 and c = 12
By substituting the values of a,b and c in the quadratic equation we get;
<em><u>Therefore, the two roots are:</u></em>
And,
Hence, the three roots of the given cubic polynomial is 0, -3 and -4
Answer:
C. x = 3
Step-by-step explanation:
When x = 3:
f(x) = x - 3 = 3 - 3 = 0
g(x) = - 1 =
- 1 =
- 1 = 1 - 1 = 0
0 = 0