A) 750-120=630 ft. His elevation is 630 ft. above sea level now.
b) 420 ft/hour. 60 minutes=1 hour. 420 ft/60=7 ft/minute. The average change in elevation is 7 ft/minute.
c) 630ft/7ft=90 minutes. If he starts at 630 ft and descends at a speed of 7 ft/min, it will take him 90 minutes. 90 minutes=1 1/2 hours. 1 1/2 h+4 h=5 1/2 hours. If he's starts his descent at 4 pm, he will reach sea level at 5:30 p.m.
1. 4
2. 14
should be correct
The first thing we must do in this case is to define variables.
We have then:
x: speed of the giraffe
x + 5: speed of the ostrich
By definition we have:
d = v · t
d / v = t
Where,
d: distance
v: speed
t: time
Since the time is the same then we have:
5 / (x + 5) = 4 / x
5x = 4 (x + 5)
Clearing x we have:
5x-4x = 20
x = 20 mph (speed of the giraffe)
x + 5 = 20 + 5 = 25 mph (speed of the ostrich)
Answer:
20 mph (speed of the giraffe)
25 mph (speed of the ostrich)
Answer: Mark me brainliest..
Step-by-step explanation: and imma put the answer inside the comments if you do so. youve got nothing to lose! :D
The addition of the algebraic expression of 3x²y, -5x²y, -x²y is; -3x²y
Algebraic addition:
According to the question;
- We are required to add the algebraic terms; 3x²y, -5x²y and -x²y
Since all terms have the same combination of algebraic variables and only differ in coefficient the sum is;
Therefore, the algebraic expression 3x2y, -5x2y, -x2y when added is equivalent to - 3x²y
Read more on algebraic addition;
brainly.com/question/4344214