6 because if thet are doing it togather jhon will speed things up
Answer:
Evan is incorrect.
Step-by-step explanation:
20 ÷ 25 =
0.8 =
0.8 × 100% =
80%;
Good luck buddy!
The chance is 1 out of 3. The fraction is ⅓ or 1 over three.
It is tiring to type this again but... hope this helps.
First task:
To determine this we need to make difference between system that doesn't have solution and system that has infinite number of solution. If when solving equations we get 0 = 0 that means system has infinite number of equations.
If we get 0 = some number that means that system doesn't have solution.
Multiplying first equation of second system by 2 and adding it to second equation we get 0=0 which means that this system has infinite number of solutions.
Answer is second system
Second task:
For this we need to set a system of equations and solve it. System looks like this:
x + y = 224
x*12 + y*8=2520
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x represents older than 18 and "y" 18 and younger than that.
first equation we multiply with -12 and sum it with second.
-4y = -168
y=168/4 = 42
Answer is 42.
Density graphs have an area of 1 to represent 100% of the possibilities.
The length is 80
80 * height = 1
Height = 1 / 80
Height = 0.0125 (D)
