1/4 or 4/8 or 5/10
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The rationals being closed under subtraction means that if we start with two rational numbers and subtract them, we get another rational number. Choice c subtracts two rational numbers but gets the wrong answer, so isn't support for anything. Choice b is rational too because the square root of 4 is 2.
Answer: b
I am pretty sure the answer is A. 16x+2
Answer:
Let x and y be the two numbers. Then
yx=57 and x−y=20
Cross multiplying the proportion
5x=7y or y=75x
So, x−y=20
x−75x=20⇒77x−5x=72x=20
⇒x=2140=70
y=75x=75×70=50
So smaller number is 50.
Check :yx=5070=57 and 70−50=20
Answer:
y=5^x
5^15= 30517578125 people
Step-by-step explanation:
x=# of cycles= 15 cycles
y= #of people recruited = what we're figuring out
Plug in 15 for x in the equation y=5^x
y= 5^15= 30517578125 people
