syd8152
26.09.2021 •
Mathematics
The quotient of a number and 2 is decreased by 3 and result is 5. What is the equation and number?
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Ответ:
( n x 2 ) - 3 = 5
n = 4
Step-by-step explanation:
The quotient (x) of a number (n) and 2 decreased (-) by 3 and the result (=) is 5.
( n x 2 ) - 3 = 5
Solve for n:
( n x 2 ) - 3 = 5
2n - 3 = 5
2n = 8
n = 4
Check:
( n x 2 ) - 3 = 5
( 4 x 2 ) - 3 = 5
8 - 3 = 5
5 = 5
Ответ:
X/2-3=5
Ответ:
f(x)=-x²
1)
f(x)=(x+4)²
f'(x)=2(x+4)=0=>x=-4 not 0
2)
f(x)=x²-4x
f'(x)=2x-4=0==>x=2 not 0
3)
f(x)=x²-16
f'(x)=2x=0==>x=0 and y=0²-16=-16 not 0
4)
f(x)=-x²
f'(x)=-2x=0==>x=0 and y=-0²=0 ok