2/5 of a number is 14. what's the number?

The number is 35

If of a number is 14, then we will perform a function of cross multiplication in order to determine the missing number.  

Therefore, the missing number (y) will the denominator of the second fraction i.e. . The first fraction is .

Thus,

of

=

(2 x y) = (5 x 14)

(2y) = (70)

2y = 70

Since we are looking for value of y, divide both sides by the value beside y

Thus,

=

y = 35

Therefore, the missing number is 35

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expression #3 is not equivalent. the others are.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

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so,

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we find "b" replacing the given point:

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option c