Answer:
see below
Step-by-step explanation:
butterfly = x minutes
breast = y minutes
total is 50 minutes
breast stroke = butterfly +20
Part A
x+y = 50
y = x+20
Part B
Substitute the second equation into the first
x+ (x+20) = 50
2x+20 = 50
2x+20-20 = 50-20
2x = 30
2x/2 = 30/2
x = 15
y = x+20
y = 20+15
y = 35 minutes
35 minutes on the breast stroke
Part C
45 minutes on the butterfly is not reasonable
We only have a total of 50 minutes
50-45 = 5
But he spend more time on the breast stroke ( 20 minutes more), but if he spend 45 minutes on the butterfly, he would have to spend less on the breast stroke.
Step-by-step explanation:
The sum of the three angles in a triangle must be 
. Since this triangle has a right angle, we know that it is 
°, so the sum of the remaining two angles must be .
We can set up an equation for the two remaining angles to determine the value of 
:
Answer:
A is the correct answer
Step-by-step explanation:
When x =4 and y =-5, and you want to evaluate equation -3x+2y, you just have to apply it into the equation.
We got the equation as:
= -3x + 2y
= -3*4 + 2*(-5)
= -12 + (-10)
= -12 - 10
= -22
Hope this help you :3
Answer:
The absolute increase was of 1750.
The relative increase was of 47.95%
Step-by-step explanation:
Absolute increase:
The absolute increase is the final population divided by the initial population.
Initial population: 3650 in 2006
Final population: 5400 in 2010
5400 - 3650 = 1750
The absolute increase was of 1750.
Relative increase:
The relative increase is the absolute increase divided by the initial population, then multiplied by 100(to answer as a percentage):
Absolute increase: 1750
Initial population: 3650
1750/3650 = 0.4795
The relative increase was of 47.95%
