56. A track coach recorded all runners' times for the 200-meter dash and
1 answer:
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Answer:
a) 419
b)34
c)81
d)52
Step-by-step explanation:
Let x represent the number of farmers who grew all three crops and y represent those who grew corn and oath.
This information is represented on a Venn Diagram as shown in the attachment (A)
Let us add all the regions in wheat and equate to 206.
We can now add all the regions in corns and equate to 178
We redraw the Venn diagram as shown in the attachment (B).
We can now answer the question using the second diagram:
Those who grew at least one of the three crops =exactly one +exactly two +exactly three
=121+111+93+24+9+19+34=419
a) Of the farmers, 419 grew at least one of the three crops.
b) Of the farmers,34 grew all three crops.
c) Of the farmers,81 did not grow any of the three crops.
Exactly two=9+19+24=52
d) Of the farmers, 52 grew exactly two of the three crops.
In the case above, Talib work is not correct as one need to first switch x and y before one can solve for y.
<h3>What is the variables about?</h3>Note that:
y=-8x+4
y-4=-8x
(y-4)/-8=x
Since the independent variable x is known, one can switch the variable labels and thus it will be:
y=(x-4)/-8
f^-1(x)=(x-4)/-8
This can be written again as:
f^-1(x)=(4-x)/8 :P
Thus one can say No, as he forgot to switch the variable labels after solving for the independent variable.
In the case above, Talib work is not correct as one need to first switch x and y before one can solve for y.
See the first part of the question below
Talib is trying to find the inverse of the function to the right. His work appears beneath it. Is his work correct? Explain your answer.
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