1. sin<span> (30°) = 1/2; 2. </span>sin<span> (300°) = - 3/2; 3. tan (30°) = 3/3; </span>4<span>. </span>sin<span> (45°) = 2/2; 5. sec (</span><span>240°) = -2; </span>6<span>. </span>sin<span> (</span>60<span>°) = 3/2; 7. </span>cos<span> (45°) = 2/2: Start a new line. 8. </span>cos<span> ... 17. tan (</span>150<span>°) = - 3/3; 18. </span>csc<span> (30°) = 2; 19. </span>csc<span> (45°) = 2; 20. </span>sec<span> (</span>210<span>°) = -2 3/3: Start a new line. 21. </span>cot<span> (45°) = 1; 22. sec (45°) = 2; 23. </span>sin<span> (330°) = -1/2; </span>24<span>. tan (135°) = -1 ...</span>
Let's give some distances
100 up 100 flat 100 down meters
then return 100 up 100 flat 100 down
time required (distance/rate = time ) 200/100 + 200/120 + 200 / 150 = 5 hr
distance 600
distance / time = average speed = 600/5 = 120 m/s
Answer:102 children and 337 adults swam at the publice pool that da
Step-by-step explanation:
let the number of children be x
and
the number of adults be y
such that the total number of people who came to use the public swimming pool be expressed as
x + y = 439----- Equation 1
and price for swimming be expressed as
1.75x + 2.50y =1021----- Equation 2
Step 2
x + y = 439----- Equation 1
1.75x + 2.50y =1021----- Equation 2
First make x the subject formulae and put in equation 2
x= 439-y
1.75 (430-y) + 2.50y = 1021
Solving gives
768.25-1.75y+2.50y=1021
2.50y-1.75y=1021-768.25
0.75y=252.75
y =252.75/0.75
y=337
To find x, put the value of y = 337 in equation 1
x+y= 439
x= 439-337
x=102
Therefore 102 children and 337 adults swam at the public pool that day
