Step-by-step explanation:
x = -4,
f(4) = -3(-4) + 15
= 12 + 15
= 27
f(0) = -3(0) + 15
= 0 + 15
= 15
f(5) = -3(5) + 1 5
=- 15 + 15
= 0
Answer:
Red pens= 7x,Blue pens= 9y
Step-by-step explanation:
Answer:
x = -5
Step-by-step explanation:
-9(x+3) = -9x-27
Add 27 onto both sides and get -9x = 45
Divide -9 on both sides and you'll see that x = -5 because 45/-9
Answer:
1 2/9 minutes
Step-by-step explanation:
55 mph
55 / 60 = 11/12
11/12 of a mile = 1 minute
45 mph
45 / 60 = 3/4
3/4 of a mile = 1 minute
11/12 divided by 3/4
11/12 * 4/3
We can cross-cancel
11/3 * 1/3 = 11/9 = 1 2/9
It takes 1 2/9 minutes for the hummingbird to cross the lake
Hope this helps!
(Please let me know if I did something wrong!)