In the equation 4x + 5 = 21, what does x =
2 answers:
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Answer:
C.
Step-by-step explanation:
If the expression has only two variables and $y$, or if there's just one variable out of these two, then the answer is yes.
If the expression has more variables (other than X and y), then the answer is no.
Answer:
D.
Step-by-step explanation:
Given:
Range is 4 less than square root of domain.
An element of domain is given by the variable 'x'.
An element of range is given by the variable 'y' or .
Now, an element of range is 4 less than the square root of the element of domain.
So, square root of element of domain is given as:
Subtracting 4 from this will give us the element of the range of the given function.
So,
Therefore, the last choice (D) is the answer.
I assuming by "solve the equation" you mean I have to find the zeroes of this equation
(i.e the values of x which satisfy this equation). For that any one of the factor value must be equal to 0 so that when it will multiply with other factors it will make the left hand side equal to right hand side giving us one of the possible solutions. Since there are 10 different factors there will be 10 different solutions here to x.
they are:
(in order of the factors mentioned in the question)
(i)
(ii)
(iii)
(iv)
x+2=0
x=-2
(v)
x-7=0
x= 7
(vi)
x+3=0
x=-3
(vii)
x-9=0
x=9
(viii)
x+7=0
x=-7
(ix)
(x)
(i.e the values of x which satisfy this equation). For that any one of the factor value must be equal to 0 so that when it will multiply with other factors it will make the left hand side equal to right hand side giving us one of the possible solutions. Since there are 10 different factors there will be 10 different solutions here to x.
they are:
(in order of the factors mentioned in the question)
(i)
(ii)
(iii)
(iv)
x+2=0
x=-2
(v)
x-7=0
x= 7
(vi)
x+3=0
x=-3
(vii)
x-9=0
x=9
(viii)
x+7=0
x=-7
(ix)
(x)