Answer:
-4.
Step-by-step explanation:
2x^2 - 5xy - y^3
= 2(-3)^2 - 5(-3)(-2) - (-2)^3
= 2*9 - 5(-3)(-2) - (-8)
= 18 -5*6+ 8
= 18 - 30 + 8
= -12 + 8
= -4.
y = x + 1
Sammy wants to train in the gym. Registration in a city gym costs $ 1. The gym fee is $ 1 per day.
We define the variables:
x = number of days.
y = full payment of the gym after x days.
Answer:
The slope represents the cost per day of the gym.
m = 1 $ / day
The intersection with the y-axis represents the inscription in the gym.
b = 1 $
Subtract <span>x</span> from both sides
<span>5=2x−x
</span> Simplify <span><span>2</span><span>−x</span></span> to <span>x</span>
<span>5=x
</span>Switch sides
<span><span>x=5.</span></span>