X^-n duals: 1/x^n. You cannot have negative exponents so do its inverse to get rid of the negative exponent
Answer:
Equation: 125 x 2 = x
250 ribbons
Step-by-step explanation:
We have to find the total number of ribbons used. Since Nell sold 125 packages of cookies and each package has 2 ribbons, we can make the equation 125 x 2 = x. Let x = the number of ribbons used in total. We multiply them to get 250. Therefore, 250 ribbons were used.
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Step-by-step explanation:
The quadratic formula is:

A, in this case, is -2.
B is 5
C is -11
x = 
x = 
x = 
x =
and 
We can break up the fraction to make it easier on our eyes
x = 
≈1.9843
x = 
We first need to substitute in the value of b, which is 7.

The final result is,
B) -122.
9514 1404 393
Answer:
(5 15/20) -(2 8/20) = 3 7/20
Step-by-step explanation:
Problems in "least common denominator" are made much easier if you are familiar with your times tables.
When you compare the denominator 4 to the denominator 20, you see that ...
20 = 5 × 4
An equivalent fraction is made by multiplying by 1. Here, the version of 1 you want for the top fractions is 5/5.

Similarly, the bottom fraction has its denominator multiplied by 4 to get from 5 to 20. The equivalent fraction is found by multiplying the numerator by the same number.

Then the desired difference is ...
