<h3>
Answer: Choice A</h3>
Why? Because the denominators are both the same at 2x+8. We can only add or subtract fractions when the denominators are the same. The general rule for adding fractions is
![\frac{A}{C}+\frac{B}{C} = \frac{A+B}{C}](https://tex.z-dn.net/?f=%5Cfrac%7BA%7D%7BC%7D%2B%5Cfrac%7BB%7D%7BC%7D%20%3D%20%5Cfrac%7BA%2BB%7D%7BC%7D)
We have numerators A and B added together over a common denominator C. If we didn't have a common denominator, then we'd have to do a bit of algebraic manipulation to get both fractions to a common denominator. It doesn't have to be the lowest common denominator (LCD), though it's often more efficient that way.
The answer is d
Yes the answer is d
Answer:
range=u ± 3.09 sd
Step-by-step explanation:
Given:
mean, u= 26.8 mpg
standard deviation, sd=72 mpg
% contained in interval = 99.8%
the interval for 99.8% of the values of a normal distribution is given by
mean ± 3.09 standard deviation= u ± 3.09 sd
=26.8 ± 3.09(72)
=26.8 ± 222.48
= 249.28 , -195.68
range=u ± 3.09 sd = 249.28 , -195.68 !
Answer: Allison has 3/4 cups of flour left.
Step-by-step explanation:
Allison used flour twice, the first time she used 2.5 cups of flour, and the second time she used 3/4 cups of flour. Let's convert these two the the same unit.
2.5= 2 1/2 or 5/2
Let's make this have the same base so it will be easier to add 3/4 to it.
5/2=10/4
We know she used both of these amounts of flour so let's add them. 10/4+3/4=13/4
We know she used 13/4 cups of flour. Let's convert 4 cups of flour to have the denominator of 4.
4=16/4
Now, we just have to subtract how much flour she used to make the pie and cake.
16/4-13/4=3/4
Allison has 3/4 cups of flour left.