Tanisha: She simplified the X and Y so they will only appear on one side.
Neal: He took away the parentheses so that he could put the exponent elsewhere.
They both are doing the problem right, just in completely different ways.
Answer:
$.33 cents per roll
Step-by-step explanation:
a dozen rolls are 12 rolls
To find the unit prices, take the price and divide by the number of rolls.
$3.99/12
$.3325
But this is money so we round to the nearest cent
$.33 cents per roll
Given:
Two cubes are rolled together.
To find the probability that the sum of the numbers on the number cubes will equal 4.
Formula
P(A) =
where, A be any event.
x be the number of successful outcomes
y be the total number of outcomes
Now,
If the two cubes are rolled together, total number of outcomes = 36
In total outcomes, the sum of the numbers of cube will be 4 for (1,3),(3,1) and (2,2)
So, the number of successful outcomes = 3
Now,
Putting x=3 and y = 36 we get,
or,
Hence,
The probability that the sum of the numbers on the number cubes will equal 4 is . Option D.
Let u be speed while Lisa drove 240 miles and t be the time in completing 240 miles.
We have been given that Lisa increased her speed 20 mph than initial speed over next 540 miles. So her speed on next 540 miles will be mph.
Further more we are given that she took 3 hours more to complete the next 540 miles of the trip than she took in completing initial 240 miles. So she took hours in completing next 540 miles.
Since we know
Now we will substitute our given values in our equation and find out the unknowns. After substitution we will get two equations and two unknowns.
Now we will substitute equation 1 in equation 2
Upon solving this equation, we get
Therefore, total time for Lisa to complete the entire trip is 6+6+3 = 15 hours.
And we know that total distance covered is 240+540 = 780 miles
Hence, average speed