Answer:
- Option A
- Speed of plane is 240 km/h, speed of wind is 50 km/h
Step-by-step explanation:
With the tail wind the total speed is the sum of the speeds of plane and wind.
When into wind the total speed is the difference of speeds of plane and wind.
The first equation is
The second equation is
Simplify both equations and solve the system
- r + w = 1740/6 ⇒ r + w = 290
- r - w = 570/3 ⇒ r - w = 190
Solve by elimination, add up the equations
- r + w + r - w = 290 + 190
- 2r = 480
- r = 240
Find the value of w
- 240 + w = 290
- w = 290 - 240
- w = 50
Answer:
C
Step-by-step explanation:
You read piece wise as
2 turns on at x = -5, then turns off at x = - 1 and so on
Answer:
-4
Step-by-step explanation:
Since the total score <em>I</em><em>n</em><em>c</em><em>r</em><em>e</em><em>a</em><em>s</em><em>e</em><em>d</em><em> </em>by eight than the two matching cards must have been -4.
(total of four cards) + (two matching cards) = total score
(total of four cards) + (two cards × -4) = total score
(total of four cards) - 8 = total score
* take away two matching cards by adding 8 on both sides*
(total of four cards) = total score + 8
The last one is correct because the line is not going up or down it’s every where so it’s the last one
Answer:
17.5
Step-by-step explanation:
17×4=68; half of 4 is 2; 68+2=70
