Answer:
Step-by-step explanation:
Given
Direct variation implies that:
Where k is the constant of variation.
Required
Find y when
Make k the subject
For:
For:
becomes
Substitute
Make y the subject
Lets check...
42/56 = 56/64
cross multiply
(56)(56) = (42)(64)
3136 = 2688...(incorrect)...these are not proportional
proportions are nothing but equivalent fractions
42/56 = 3/4
56/64 = 7/8
as u can see, they are not equivalent fractions...so they are not proportional
X+y = -2 is the same as y = -x-2 when you subtract x from both sides
x+y = -2 is the same as 2x+2y = -4 when you multiply both sides by 2
So A, B, and C are the same equation just in a different form.
Answer: Choice D) any of the above
Answer: one angle would be 50 degrees while the other would be 130 degrees.
Step-by-step explanation:
Answer is C hope this helps