Answer:
C. Kalena made a mistake in Step 3. The justification should state: -x²
+ x²
Step-by-step explanation:
Given the function x(x - 1)(x + 1) = x3 - X
To justify kelena proof
We will need to show if the two equations are equal.
Starting from the RHS with function x³-x
First we will factor out the common factor which is 'x' to have;
x(x²-1)
Factorising x²-1 using the difference of two square will give;
x(x+1)(x-1)
Note that for two real number a and b, the expansion of a²-b² using difference vof two square will give;
a²-b² = (a+b)(a-b) hence;
Factorising x²-1 using the difference of two square will give;
x(x+1)(x-1)
Factorising x(x+1) gives x²+x, therefore
x(x+1)(x-1) = (x²+x)(x-1)
(x²+x)(x-1) = x³-x²+x²-x
The function x³-x²+x²-x gotten shows that kelena made a mistake in step 3, the justification should be -x²+x² not -x-x²
Answer:
0.75
Step-by-step explanation:
Donny is correct. To solve this problem all you need to do is add 35 to 15 equation below ⬇️
400 x 20 / 100
$80 is being deducted from the original price so you only pay $320.
First you need to multiply the cost of the vases times 2. Then you need to add the sales tax to the cost of both vases. The total would end up being $8.52. Next you subtract 8.52 from 28.50. You would get 19.98. Then lastly you it by three. So the cost of 1 package of glass beads is $6.66.
