Answer:
6
Step-by-step explanation:
6*6=36
=6
Answer:
-14
Step-by-step explanation:
First of all, we know that 5x^2+ ax+7x +5=0 only has one root. That means that b^2 - 4ac=0, and we can use this to find the discriminant, ax + 7x.
Now, if we simplified 5x^2+ ax+7x +5=0, by dividing it all by 5, it would be x^2+(a+7)/5x + 1 = 0.
After, we can plug what we know into the formula, b^2 - 4ac=0. It would be:
(a+7)^2 / 25 - 4 = 0
(a+7)^2 / 25 = 4
(a+7)^2 = 100
Since this is a square root, a+7 can be both negative or positive.
a+7= 10, or a+7 = -10
a=3, or a=-17
The question asks for the sum of a, which is 3 + (-17) = -14
Therefore, the answer is -14.
:) have fun with your rsm problems, assuming you got this from the portal.
The answer is 144 but I do not know the property
Answer:
Step-by-step explanation:
![-3 +\dfrac{1}{3}x - 4.5 -\dfrac{1}{5}x\\\\\\= -3 - 4.5 +\dfrac{1}{3}x - \dfrac{1}{5}x\\\\\\= - 7.5 + \dfrac{1*5}{3*5}x - \dfrac{1*3}{5*3}x\\\\\\= -7.5 +\dfrac{5}{15}x-\dfrac{3}{15}x\\\\\\= -7.5 + \dfrac{5-3}{15}x\\\\\\= -7.5 +\dfrac{2}{15}x](https://tex.z-dn.net/?f=-3%20%2B%5Cdfrac%7B1%7D%7B3%7Dx%20-%204.5%20-%5Cdfrac%7B1%7D%7B5%7Dx%5C%5C%5C%5C%5C%5C%3D%20-3%20-%204.5%20%2B%5Cdfrac%7B1%7D%7B3%7Dx%20-%20%5Cdfrac%7B1%7D%7B5%7Dx%5C%5C%5C%5C%5C%5C%3D%20-%207.5%20%2B%20%5Cdfrac%7B1%2A5%7D%7B3%2A5%7Dx%20-%20%5Cdfrac%7B1%2A3%7D%7B5%2A3%7Dx%5C%5C%5C%5C%5C%5C%3D%20-7.5%20%2B%5Cdfrac%7B5%7D%7B15%7Dx-%5Cdfrac%7B3%7D%7B15%7Dx%5C%5C%5C%5C%5C%5C%3D%20-7.5%20%2B%20%5Cdfrac%7B5-3%7D%7B15%7Dx%5C%5C%5C%5C%5C%5C%3D%20-7.5%20%2B%5Cdfrac%7B2%7D%7B15%7Dx)
Answer:
The answer is "The cops were correct because the average speed would have been about 39.73 miles per hour as per the calculations."
Step-by-step explanation:
Finding the average skid distance:
![Average=\frac{70+71+72}{3}=\frac{213}{3}=71](https://tex.z-dn.net/?f=Average%3D%5Cfrac%7B70%2B71%2B72%7D%7B3%7D%3D%5Cfrac%7B213%7D%7B3%7D%3D71)
Calculating the skid:
![=\sqrt{30 \times 71 \times 0.78\times 0.95}\\\\=\sqrt{1,578.33}\\\\=39.73](https://tex.z-dn.net/?f=%3D%5Csqrt%7B30%20%5Ctimes%2071%20%5Ctimes%200.78%5Ctimes%200.95%7D%5C%5C%5C%5C%3D%5Csqrt%7B1%2C578.33%7D%5C%5C%5C%5C%3D39.73)