Answer: please mark me brainliest
In 1 hour, the first train will have traveled 60 miles.
Let t be the time before the first train catches up to the second. Then:
60t+60=80t
20t=60
t=3 hours
Since the 2nd train leaves at 1:00, and travels 3 hours before catching up, he will catch the 1st train at 4:00 p.m. …………………
Step-by-step explanation:
8 * 5 = 40
40 * 4 = 160
160 * 12 = 1,920
Answer: $1,920
In one minute, the heart beats 114 2/3 times
Answer:
Part 1
Given equation:
C(t) = -0.30 (t – 12)² + 40
For t = 0
C(t) = -0.30 (0 - 12)² + 40
C(t) = -0.30 (-12)² + 40
C(t) = -3.2
For t = 12 (noon)
C(t) = -0.30 (12 - 12)² + 40
C(t) = -0.30 (0)² + 40
C(t) = 40
For t = 24 (midnight)
C(t) = -0.30 (24 - 12)² + 40
C(t) = -0.30 (12)² + 40
C(t) = -0.30 × 144 + 40
C(t) = - 43.2 + 40
C(t) = -3.2
Part 2
attached below
Part 3
C(t) = –0.30(t – 12)² + 40
F(t)=9/5C(t)+32
Substituting the values:
F(t)=9/5{–0.30 (t – 12)² + 40}+32
F(t) = -0.54 (t – 12)² + 72 + 32
F(t) = -0.54 (t – 12)² + 104
5, 6 and 7, should be simplish
good luck, i hope this helps :)
Step-by-step explanation:
Answer:
40 divided by 4 is 10, the next question, it is 10 times the value, 2,143 and 164
Step-by-step explanation:
