4.95 is how much he paid so you cannot go past that number
he bought 7 books at .35 cents, he spent 2.45 on that [ 7 x 0.35 ]
he bought 5 books at .50 cents , he spent 2.50 on that [ 5 x .50 ]
2.45 plus 2.50 = 4.95
7 plus 5 = 12
He bought 12 total books
Answer:
B
Step-by-step explanation:
Answer:
2^2×20
Step-by-step explanation:
2^2×20
because 2×20=40
so, 2^2×20=2^40
Total cost of tickets =3×21=63
After discount=63-(2×9)
=45
Answer:
Ground speed is 61.67 km /h.
Step-by-step explanation:
Ground speed of aircraft is obtained b the sum of aircraft speed minus the current speed and direction.
For this the given formula is
81-27 cos (255 - 81 )
53.704 km/h
27 sin ( 225 - 81 ) = 2.822 km /h
so ground speed =
= 61.67 km /h