Answer:
Answer a
Step-by-step explanation:
Since there is a radical in the first fraction, we need to multiply it by the same radical in the denominator of another fraction to get rid of the root.
Any vector that points in the same or opposite direction would be parallel. So you can just scale (-2, 3) by any real number <em>t</em> to get the vector (-2<em>t</em>, 3<em>t</em> ).
For example, if <em>t</em> = -1, you get the vector (2, -3); if <em>t</em> = 2, you get (-4, 6).
Answer: The constant of proportionality is r = 5.
Step-by-step explanation:
O, we know that x and y are proportional, this means that:
y = r*x
where r is the constant of proportionality.
we also have the table
x y
7 35
12 60
20 100
Now, we can replace those values in our equation and get, for the first pair:
35 = r*7
r = 35/7 = 5
for the second pair:
60 = r*12
60/12 = 5 = r
So we can conclude that the constant of proportionality is 5.
Answer:
90/[10+(3-3-4)]=90/[10+(-10)]
90/(10-10)=90/0=0
Step-by-step explanation:
Hope this helps