Let <em>a</em> denote the airplane's speed in still air, and <em>w</em> the windspeed.
When the plane flies against the wind, it can travel an average speed of
(4500 km) / (6 h) = 750 km/h
so that
<em>a</em> - <em>w</em> = 750 km/h
Flying with the wind, it moves at a speed of
(2910 km) / (3 h) = 970 km/h
so that
<em>a</em> + <em>w</em> = 970 km/h
Add the two equations to eliminate <em>w</em> and solve for <em>a</em> :
(<em>a</em> - <em>w</em>) + (<em>a</em> + <em>w</em>) = 750 km/h + 970 km/h
2<em>a</em> = 1720 km/h
<em>a</em> = 860 km/h
Subtract them to eliminate <em>a</em> and solve for <em>w</em> :
(<em>a</em> - <em>w</em>) - (<em>a</em> + <em>w</em>) = 750 km/h - 970 km/h
-2<em>w</em> = -220 km/h
<em>w</em> = 110 km/h
Polygons are 2D shapes with straight sides. Quadrilaterals are polygons with four sides.
Trapezoids, rectangles, squares and parallelograms are all quadrilaterals as they have four sides.
Not all polygons are quadrilaterals.
H = cost of horseback riding per hr, p = cost of parasailing per hr
3h + 2p = 192...multiply by 2
2h + 3p = 213..multiply by -3
------------------
6h + 4p = 384 (result of multiplying by 2)
-6h - 9p = - 639 (result of multiplying by -3)
-----------------add
-5p = - 255
p = -255/-5
p = 51 <== cost of 1 hr for parasailing
3h + 2p = 192
3h + 2(51) = 192
3h + 102 = 192
3h = 192 - 102
3h = 90
h = 90/3
h = 30 <== cost of 1 hr of horseback riding
Answer:
-3/2, -3/5, 3/5, 3/2
Step-by-step explanation:
-3/2 Is The Leastest Number Beacuse It Has A Negative Number And -3/2 = -1.5
-3/5 Is The Second Least Number Because -3/5 > -3/2, It Is Also A Negative As Well As -3/2
3/5 Is The Second Greatest Number Because It Is A Positive Number And 3/5 = 0.6
3/2 Is The Greatest Number Because 3/2 > 3/5, It Is Also A Positive Number As Well As 3/5.