Answer:
Sale Price = $36
Step-by-step explanation:
To find the sale price, you need to find what 10% of the original price is. 10% of $45 is $4.50. Now we need to find what 20% is, 20% is double 10% so we multiply the answer we got by 2. This equals to $9. The question is asking for the sale price, to find it you have to subtract $9 (the discount) from $45 (regular price). The answer you should get is $36.
Equation:
$45 ÷ 10 = $4.50
$4.50 × 2 = $9
$45 - $9 = $36
<span> y^2 = (3x + 1)^3 / 9x + 2
2*y*(dy/dx)=(9</span>(3x + 1)^2*(9x + 2) -((9*(3x + 1)^3))/ ((9x + 2)^2)
(dy/dx)=(9(3x + 1)^2*(9x + 2) -((9*(3x + 1)^3))/ (2*y*(9x + 2)^2)
(dy/dx)=(9(3x + 1)^2*(6x + 1))/ (2*y*(9x + 2)^2)
answer
A
Answer:
Square foot need to be painted, if width is equal to 
feet
Step-by-step explanation:
Complete question -
Maya wants to paint one wall in her room blue. The wall is 22,9 feet high, and have no doors or windows. How many square feet need to be painted?
Solution -
The square feet need to be painted will be equal to the product of height and width of the wall i.e surface area of the wall
Let the width of the wall be feet
Surface area of the wall 
Where H is the height of the wall in feet
W is the width of the wall in feet
Substituting the given values in above equation, we get -
Square foot.
Thus, Square foot need to be painted
