Substituting into a formula - Quiz 1    Question

Question 1

Find the average of 100 and -60 using the formula    where    and 

a)				b)
c)				d)

 

Your answer is correct.

Not correct. Choice (b) is false.

Try again, you might have missed the negative sign and calculated

Not correct. Choice (c) is false.

Try again, you have the wrong sign for your answer.

Not correct. Choice (d) is false.

Try again, you might have only divided one of the numbers by 2 getting 

Question 2

If  and what is the value of 

a)				b)
c)				d)

 

Not correct. Choice (a) is false.

Try again, you may have forgotten to change a sign.

Your answer is correct.

	=
	=
	=

Not correct. Choice (c) is false.

Try again, remember two negatives make a positive.

Not correct. Choice (d) is false.

Try again, remember means

Question 3

If    and    what is the value of 

a)				b)
c)				d)

 

Your answer is correct.

Not correct. Choice (b) is false.

Try again, remember

Not correct. Choice (c) is false.

Try again, remember

Not correct. Choice (d) is false.

Try again, remember

Question 4

If    and    what is the value of 

a)				b)
c)				d)

 

Not correct. Choice (a) is false.

Try again, carefully look at the signs.

Not correct. Choice (b) is false.

Try again, the formula uses and you have probably used look carefully at the signs as well.

Your answer is correct.

Not correct. Choice (d) is false.

Try again, the formula uses and you have probably used

Question 5

Find    if   where    and 

a)				b)
c)				d)

 

Not correct. Choice (a) is false.

Try again, you have not performed the steps in the right order.

Not correct. Choice (b) is false.

Try again, you probably have the and the in the wrong order and have solved 

Not correct. Choice (c) is false.

Try again, you have probably mixed up some signs.

Your answer is correct.

We need to solve    for 

	=
	=
	=