Answer:
<em>The expression for final cost of the DVD is </em>
Step-by-step explanation:
Jessica purchased a DVD that was on sale for 12% off.
If the original price of the DVD is , then the amount of discount on sale will be:
So, the selling price of the DVD
The sales tax in her county is 3%. So, the amount of sales tax on the selling price will be:
Thus, the expression for final cost of the DVD is:
Answer:
x = 25
Step-by-step explanation:
The volume (V) of the triangular prism is calculated as
V = Al ( A is the area of the triangular face and l is its length )
A = bh = 0.5 × 5 × 8 = 20 cm² , then
V = 20 × 20 = 400 cm³
The volume of the cuboid is calculated as
V = lbh = 3.2 × 5 × x = 16x
Given V = 400 cm³ , then
16x = 400 ( divide both sides by 16 )
x = 25