The equation would be
letter b. 25h + 20 (15 - h) = 350
Let’s try to solve to get the value of h
=> 25h + 20(15 -h) = 350
=> 25h + (300 – 20h) = 350
=> 25h + 300 – 20h = 350
=> 300 + 5h = 350
=> 5h = 350 – 300
=> 5h / 5 = 50/ 5
=> h = 10
Thus the value of h is 10 which means a car travel on the highways and
used 10 gallons of gasoline,
Solution: We are given:
![Mean =78, Standard-deviation =6.3](https://tex.z-dn.net/?f=Mean%20%3D78%2C%20Standard-deviation%20%3D6.3)
We know that a usual values of the test scores falls within 2 standard deviation from the mean.
Therefore, the minimum usual test score is:
![Mean - 2 Standard-deviation](https://tex.z-dn.net/?f=Mean%20-%202%20Standard-deviation)
![78-2 \times 6.3](https://tex.z-dn.net/?f=78-2%20%5Ctimes%206.3)
![78-12.6](https://tex.z-dn.net/?f=78-12.6)
![65.4](https://tex.z-dn.net/?f=65.4)
The maximum usual test score is:
![Mean + 2 Standard-deviation](https://tex.z-dn.net/?f=Mean%20%2B%202%20Standard-deviation)
![78+2 \times 6.3](https://tex.z-dn.net/?f=78%2B2%20%5Ctimes%206.3)
![78+12.6](https://tex.z-dn.net/?f=78%2B12.6)
![90.6](https://tex.z-dn.net/?f=90.6)
Therefore, the minimum and maximum “usual” values of the test scores are:
65.4 and 90.6
Looking at the data it looks like a line. So the answer will be in y+mx+b format.
Knowing it is a line eliminates answers b and c.
looking at options a is says it starts at about .1 when x is zero. We can see this looks pretty close as the left-most dot is below 1 already.
The slope on a is 1/2--> increasing 1 vertically for every 2 horizontally. The pattern mostly follows that rule.
Therefore a (y=1/2x+.1) would be the correct answer
Answer:
x+1=3
Step-by-step explanation:
x+1=3