Answer: 35.6 (choice A)
To get this answer, add up the values: 39+42+27+45+25 = 178
Next, divide that result by 5 because there are 5 scores added up in the previous step. Doing this division gets us to: 178/5 = 35.6
Im pretty sure the answer is 320
I did this by doing 240 divided by 45 = 5.333... then taking that and multiplying it by 60 because thats how many min. are in an hour and it = 320
Answer:
-5/9
Step-by-step explanation:
Note. If the line is parallel, then the slope is shared. If the line is perpendicular (directly opposite), it means to flip the sign as well as the fraction.
The slope of line g is 9/5. This means that the slope of line h, (which is perpendicular to line g), would be the opposite, or -5/9
-5/9 is your answer.
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![3x^2 -42x + 9 = -5](https://tex.z-dn.net/?f=3x%5E2%20-42x%20%2B%209%20%3D%20-5)
Subtract 9 from both sides
![3x^2 -42x = -5 - 9](https://tex.z-dn.net/?f=3x%5E2%20-42x%20%20%3D%20-5%20-%209)
![3x^2 -42x = -14](https://tex.z-dn.net/?f=3x%5E2%20-42x%20%20%3D%20-14)
Divide by 3 through
![x^2 -14x = - \dfrac{14}{3}](https://tex.z-dn.net/?f=x%5E2%20-14x%20%20%3D%20-%20%5Cdfrac%7B14%7D%7B3%7D%20)
Add (b/2)^2 to form perfect square
![x^2 -14x + (\dfrac{14}{2})^2 = - \dfrac{14}{3} + (\dfrac{14}{2})^2](https://tex.z-dn.net/?f=x%5E2%20-14x%20%2B%20%20%28%5Cdfrac%7B14%7D%7B2%7D%29%5E2%20%20%3D%20-%20%5Cdfrac%7B14%7D%7B3%7D%20%2B%20%20%28%5Cdfrac%7B14%7D%7B2%7D%29%5E2%20%20)
Form perfect square
![(x -7)^2 = \dfrac{7}{3}](https://tex.z-dn.net/?f=%28x%20-7%29%5E2%20%20%3D%20%20%5Cdfrac%7B7%7D%7B3%7D)
square root both sides
![(x -7) = \pm \sqrt{\dfrac{7}{3}}](https://tex.z-dn.net/?f=%28x%20-7%29%20%3D%20%5Cpm%20%5Csqrt%7B%5Cdfrac%7B7%7D%7B3%7D%7D%20%20)
Add 7 to both sides
![x = \pm \sqrt{\dfrac{7}{3}} + 7](https://tex.z-dn.net/?f=x%20%20%3D%20%20%20%5Cpm%20%5Csqrt%7B%5Cdfrac%7B7%7D%7B3%7D%7D%20%20%2B%207)
Rewrite the answer into 2 different answers
![x = 7 + \sqrt{\dfrac{7}{3}} \ or \ 7 - \sqrt{\dfrac{7}{3}}](https://tex.z-dn.net/?f=x%20%20%3D%20%20%207%20%2B%20%20%5Csqrt%7B%5Cdfrac%7B7%7D%7B3%7D%7D%20%20%5C%20or%20%5C%20%207%20-%20%5Csqrt%7B%5Cdfrac%7B7%7D%7B3%7D%7D)
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16 students are girls since 3+4 is 7 and 7*4 is 28. With this you multiply 4 by 4 since it is boys to girls and you will get 16 which is the answer.