-5x^5 * -8x^4 - 5x^5*-9x - 5x^5*-9
= 40x^9 + 45x^6 + 45x^5
Answer:
1 hour
Step-by-step explanation:
Hello, let's say that her departure trip takes t in minutes, as her return speed is 3 times her departure speed, she took t/3 for the return and we know that this 40 minutes less, so we can write.
t/3=t-40
We can multiply by 3
t = 3t -40*3 = 3t - 120
This is equivalent to
3t -120 = t
We subtract t
2t-120 = 0
2t = 120
We divide by 2
t = 120/2 = 60
So this is 60 minutes = 1 hour.
Thank you.
Answer:
x=82/81
Step-by-step explanation:
Complementary is when angles equal 90 degrees.
supplementary is when angles equal 180 degrees.
a)
supp:145 degrees
comp:55 degrees
b)
supp:23 degrees
comp: none
c)
supp:159 degrees
comp:69 degrees
