Answer:
44 mph
Step-by-step explanation:
Given that:
Before lunch :
Time taken = 2hrs ; at speed = x mph
After lunch :
Time taken = 3hrs ; at speed = x + 10 mph
Total distance covered = 250 miles :
Distance = speed * time
(2 * x) + (3 * (x + 10)) = 250
2x + 3x + 30 = 250
5x + 30 = 250
5x = 250 - 30
5x = 220
x = 220/ 5
x = 44 mph
Rate before lunch is 44mph
Answer:
y = - 10
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 2 when x = - 4, that is
2 = - 4k ( divide both sides by - 4 )
= k, that is
k = -
y = - x ← equation of variation
When x = 20, then
y = - × 20 = - 10
Answer:
C.3.415 kg
Step-by-step explanation:
Put first number in ones place.Th rest as follows
M<BFG = 1/2(arcGB + arcCD)
answer is A. first one.
Answer:
B
Step-by-step explanation:
To determine which ordered pair is a solution, substitute the coordinates of the point into the left side of the inequality and if it satisfies the inequality then it is a solution.
A (- 3, 0 )
- 9 + 0 = - 9 < -8 → (- 3, 0) is not a solution
B (- 2, - 1)
- 6 - 1 = - 7 > - 8 → ( - 2, - 1) is a solution
C (0, - 10)
0 - 10 = - 10 < - 8 → (0, - 10) is not a solution
D (2, - 16)
6 - 16 = - 10 < - 8 → (2, - 16) is not a solution
