Answer:
r = 54 miles per hour
Step-by-step explanation:
Since we have been given the values for two of the unknowns, we can substitute them into the equation to find the third.
d = 405
t = 7.5
d = rt
405 = r (7.5)
405=7.5r
Now to find r, we need to get it by itself on one side so we have r = ...
We can do this by dividing 7.5 from both sides of the equation as this will cancel out the 7.5, leaving us with the r value, and everything you do to one side of an equation must also be done to the other side.
405/7.5=7.5r/7.5
54=r
The unknown value 'r' = 54
Since 'r' stands for 'rate', the units given must be appropriate for speed. As the distance was given in miles, and the time in hours, the unit for 'r' must be miles/hour. Therefore r=54miles/hour.
Hope this helped!
Answer:
the first one is the answer, with maybe the third if you can choose multiple.
Step-by-step explanation:
Let's go throught hese one at a time. First though it is important to note that the poitns look like they are going upward. So we want a relationship that it makes sense as one increases so does the other.
the amount of money made made compared to the amount of items sold
So, pretending we run a store. Does it make sense that if we make more money more items were sold? I would say so.
the amoutn of ink left in a pen compared to the time using it
Doe sit make sense that as the amount of ink increases the time using it increases? i would say no, because ink usually decreases the more it is used.
the amount of money in your account compared to the number of stores that you shop at
Does it make sense that if you have more money in your account you shop at more stores? I think so, though the first one still makes the most sense if you can only pick one. Since it doesn't seem directly to imply that, I would say it makes more sense that you just but more in general, not necessarily from more stores.
the number of goals scored in a soccer match compared to the number of red cards given
does it make sense that more goals would also have more red cards? i don't think so, though I don't know soccer that much. it doesn't seem like goals mean there should be any more red cards.
So in total it seems like the first one is the answer, with maybe the third if you can choose multiple.
Answer: The machine would now be $1020
Step-by-step explanation: Multiply $1,275 by 0.8 because 0.8 is 20% off, then you get your answer.
Additive inverse is what you add to a number to get zero.
So, by definition, the additive inverse of (-8 + 3i) would be <em>(8 - 3i)</em>.
Answer:
7
Step-by-step explanation:
(f + g)(n) = f(n) + g(n) = n - 3 + n - 2 = 2n - 5 , thus
(f + g)(6) = 2(6) - 5 = 12 - 5 = 7
