My work:
<span>Simplifying
(4x3 + 7y3z4)(4x3 + 7y3z4) = 0
Multiply (4x3 + 7y3z4) * (4x3 + 7y3z4)
(4x3 * (4x3 + 7y3z4) + 7y3z4 * (4x3 + 7y3z4)) = 0
((4x3 * 4x3 + 7y3z4 * 4x3) + 7y3z4 * (4x3 + 7y3z4)) = 0
Reorder the terms:
((28x3y3z4 + 16x6) + 7y3z4 * (4x3 + 7y3z4)) = 0
((28x3y3z4 + 16x6) + 7y3z4 * (4x3 + 7y3z4)) = 0
(28x3y3z4 + 16x6 + (4x3 * 7y3z4 + 7y3z4 * 7y3z4)) = 0
(28x3y3z4 + 16x6 + (28x3y3z4 + 49y6z8)) = 0
Reorder the terms:
(28x3y3z4 + 28x3y3z4 + 16x6 + 49y6z8) = 0
Combine like terms: 28x3y3z4 + 28x3y3z4 = 56x3y3z4
(56x3y3z4 + 16x6 + 49y6z8) = 0
Solving
56x3y3z4 + 16x6 + 49y6z8 = 0
Solving for variable 'x'.
Factor a trinomial.
(4x3 + 7y3z4)(4x3 + 7y3z4) = 0
Subproblem 1Set the factor '(4x3 + 7y3z4)' equal to zero and attempt to solve:
Simplifying
4x3 + 7y3z4 = 0
Solving
4x3 + 7y3z4 = 0
Move all terms containing x to the left, all other terms to the right.
Add '-7y3z4' to each side of the equation.
4x3 + 7y3z4 + -7y3z4 = 0 + -7y3z4
Combine like terms: 7y3z4 + -7y3z4 = 0
4x3 + 0 = 0 + -7y3z4
4x3 = 0 + -7y3z4
Remove the zero:
4x3 = -7y3z4
Divide each side by '4'.
x3 = -1.75y3z4
Simplifying
x3 = -1.75y3z4
The solution to this equation could not be determined.
This subproblem is being ignored because a solution could not be determined.
Subproblem 2Set the factor '(4x3 + 7y3z4)' equal to zero and attempt to solve:
Simplifying
4x3 + 7y3z4 = 0
Solving
4x3 + 7y3z4 = 0
Move all terms containing x to the left, all other terms to the right.
Add '-7y3z4' to each side of the equation.
4x3 + 7y3z4 + -7y3z4 = 0 + -7y3z4
Combine like terms: 7y3z4 + -7y3z4 = 0
4x3 + 0 = 0 + -7y3z4
4x3 = 0 + -7y3z4
Remove the zero:
4x3 = -7y3z4
Divide each side by '4'.
x3 = -1.75y3z4
Simplifying
x3 = -1.75y3z4
The solution to this equation could not be determined.
This subproblem is being ignored because a solution could not be determined.
The solution to this equation could not be determined.
Hope that this help you! =)</span>
Answer:
a=3
Step-by-step explanation:
3a+2=11
-2
3a=9/3
a=3
The cost of the mp3 player after the discount is $27.98.
<h3>
What is percentage?</h3>
A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by whole and multiply by 100.
Given
An mp3 player is on sale for 30% off the regular price of $39. 98.
The price of the mp3 player after the 30% is given

The cost of mp3 player after 30% discount is;
= $39.98 - $11.99 = $27.98
Hence, the cost of the mp3 player after the discount is $27.98.
To know more about percentage click the link givem below.
brainly.com/question/9776399