Answer:
49/4
Step-by-step explanation:
x^2+7x=4
Take the coefficient of x
7
Divide by 2
7/2
Then square it
(7/2) ^2 = 49/4
Add this to both sides of the equation to complete the square
Answer: 14 hours
Step-by-step explanation:
Let the number of hours of TV that Jamie watched be represented by x.
Since Roberto watched 5 more hours of tv than Jamie last week, therefore the number of hours of TV that Roberto watched will be: x + 5
Together, they watched a total of 23 hours of tv last week. Therefore,
x + (x + 5) = 23
2x + 5 = 23
2x = 23 - 5
2x = 18
x = 18/2
x = 9
Jamie watched 9 hours of TV
Therefore, Roberto watched x+ 5 = 9 + 5 = 14 hours
1 km / 5 mins
Convert 1 km to meters:
1000 m / 5 mins
Divide by 5 on both sides:
200m / 1 min
Convert 1 min to seconds:
200m / 60 sec
Divide by 60 on both sides
3.33m / sec (nearest hundredth)
Answer: Matty's speed is 3.33m/s
B. The number that represents the middle value in the set of numbers.
