Well.. instead of k he could have put 7. He should know that x and y are cut in half of their original values.
Hope I helped you!
Answer:
4.4 miles
Step-by-step explanation:
c= sqrt 6^2+10^2
sqrt 36+100
Sqrt 136=11.66190378
10+6=16
16-11.66190378=4.33809622
Answer:
The answer is below
Step-by-step explanation:
a) The integral
means the total change in level of water in inches from 1 am to 10 am. That is the water level change measured in inches between 1 am and 10 am
b) 7 pm is represented as t = 19 hours, while midnight is represented as t = 24 hours, hence the water level change between 7 pm and midnight is:

c) Using casio calculator to evaluate the integral gives:
= 2.54 inches
D) The total daily change in water level =
= 0.35 inches
Answer:
A. (-7 -2)
Step-by-step explanation:
You can eliminate y by multiplying the first equation by 7 and subtracting 6 times the second equation:
7(-3x +6y) -6(5x +7y) = 7(9) -6(-49)
-21x +42y -30x -42y = 63 +294 . . . . eliminate parentheses
-51x = 357 . . . . . . . . collect terms
x = -7 . . . . . . . divide by -51. This matches answer choice A.
Its 30 you find the unit rate by 21÷7 which equals 3 then you multipy 3x10 which gives you 30