Answer:
More expensive
Step-by-step explanation:
FIRST WASHING MACHINE PRICE - $360
SECOND WASHING MACHINE PRICE - MUST NOT BE CHEAPER
$720 x 30% = $216
The additional percentage must make the washing machine more expensive than the first one.
B because in commutative property of addition the numbers switch but they do not change the sign nor the numbers. hope this helped
Answer:
Option 3 :
x → 7+, y → –[infinity]
Step-by-step explanation:
f(x) = (-2x² + 14)/(x² - 49)
x² - 49 = (x + 7)(x - 7)
Hence f(x) goes to infinity at x = - 7 or 7
x < - 7 = (-ve)(-ve) = + ve
=> x → –7–
Here, x² - 49 is + ve
-7 < x < 7 = (+ve)(-ve) = - ve
=> x → –7+ or x → 7– .
here, x² - 49 is - ve
x > 7 = (+ve)(+ve) = + ve
=> x → 7+
Here, x² - 49 is + ve
So (-2x² + 14) is - ve for all [ x → –7– , x → –7+ , x → 7– , x → 7+ ]
As,
-2(-7)² + 14 = -84 and -2(+7)² + 14 = -84
x → –7– = (-ve)/(+ve)
=> y → -[infinity].
x → –7+ or x → 7– = (-ve)/(-ve)
=> y → [infinity]
x → 7+ = (-ve)/(+ve)
=> y → -[infinity].
x → 7+, y → –[infinity]. is the correct option
Answer:
It will take 0.72s for the football to hits the ground.
Step-by-step explanation:
We have that the equaation for the height of the football is
The football will hit the ground when .
Multiplying by -1
To solve this equation, we need the bhaskara formula:
Given a second order polynomial expressed by the following equation:
.
This polynomial has roots such that , given by the following formulas:
In this problem, we have that:
So
It cannot take negative seconds for the ball to hit the ground.
So it will take 0.72s for the football to hits the ground.
The last leg would be 4.472135955. I don't know the angles though.