Giải các Phương Trình Nghiệm Nguyên 1/x +1/y = 1/6xy
1 answer:
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Answer:
yes, y varies directly with x.
y=4x is an equation of the Direct Variation
Step-by-step explanation:
x y
0 0
1 4
2 8
3 12
From the above data:
we can say that y varies directly with x.
Direct variation states that if y is expressed as the product of some constant number k and x.
i.e y=kx
Now, let any points from above data x= 2 and y= 8 to calculate the value of k,
8=2k
⇒
Therefore, the equation for the direct variation is, y=4x
A. and
are congruent because they are opposite to one another across the intersection of lines C and D. (We call
and
a "vertical angle pair".)
B. For the same reason and
are congruent, we know that the angles with measures
and
are also congruent. This means
, which we can solve for
.
C.
While vertical angle pairs are congruent, adjacent angle pairs are supplementary. This means that and the measure of
(or
) add to 180 degrees. Similarly,
and the measure of
(or
) also add to 180 degrees.
With , we find