Answer:
The answer is D) (-1, -1)
Step-by-step explanation:
In order to find which answer is a solution, you have to put the ordered pair in for their given variables. If it produces a true statement, then it is a solution. In this case, D is the only one that produces a true statement.
2x + y > -4
2(-1) + (-1) > -4
-2 - 1 > -4
-3 > -4 (TRUE)
Answer:
12.625
mean=total sum value /total data set
Step-by-step explanation:
Answer:
x>4 or x <-4
Step-by-step explanation:
-2|x| < -8
Divide each side by -2, remembering to flip the inequality
-2|x|/-2 > -8/-2
|x| >4
To get rid of the absolute values, we get 2 equations one positive and one negative
x>4 or x <-4
Answer:
120 m/h
Step-by-step explanation:
The time taken to travel a distance d uphill will be ...
time = distance/speed
time = d/100
On the return trip, the same distance will be downhill, so the time will be ...
time = d/150
The average speed on hills is then ...
speed = distance/time = (2d)/(d/100 +d/150) = 2(100)(150)/(100 +150)
speed = 120 . . . . m/h
This is the same as the speed on flat ground. So, the average speed on flat ground is the same as the average speed on hills. That will be Sloan's average speed over any terrain.
Sloan's average speed was 120 m/h.
Step-by-step explanation:
8x² + 8x - 21 = 0
8(x² + x) - 21 = 0
8(x + 0.5)² - 23 = 0
8(x + 0.5)² = 23
(x + 0.5)² = 23/8.