3. Two computers Model A and B are working to do
computations. Model B is the upgraded version and can work
three times as fast. For a task, 20,000 computations are done
by Model A and 90,000 computations are done by Model B, and
it takes a total of 100 seconds. How fast does each Model
perform computations?
(Note: time = computations / rate)

a) Let x = rate of computation for A. Write a rational equation
which models the above, using:
total computational time = time for A + time for B

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.

tube or goog would be a great resource to with that question

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

think the answer would beb