<h3>
Answer: a = 64</h3>
Explanation:
We use the difference of squares rule to say
(m-n)(m+n) = m^2 - n^2
So in this particular case,
(8z-9)(8z+9) = (8z)^2-(9)^2 = 64z^2 - 81
We can see that the 64 matches with the 'a' of the expression az^2-81, which must mean a = 64
Side note: This means b = 81
Answer:
12/5
Step-by-step explanation:
-3*4/-5=-12/-5=12/5
Answer:
95% confident the population mean is between (9.1,9.9)
Step-by-step explanation:
We are given the following data set:
9.3, 9.7, 9.2, 9.7
Formula:
where 
are data points, 
is the mean and n is the number of observations.
Sum of squares of differences = 0.2075
95% Confidence interval:
Putting the values, we get,
Let
x-------------> pounds of granola-----------> <span>$3 per pound
</span>y-------------> pounds of raisins-----------> $2 per pound
z------------ > price per <span>pounds of the trail mix
</span>
we have that
z=3x+2y--------------------- > this is the equation
for x=3 pounds of granola and y=<span>0.75 pounds of raisins
z=3*3+2*0.75=</span>$10.5 of <span>trail mix</span>
