1. during a sale at a clothing store, shirts are two-fifths their usual price, pants are one-third their usual price, and accessories are three-fourths their usual price.
(c) padma bought the following items. what is the sale price of each item as a fraction or a whole number? show your work.
item
original price
t-shirt
$15
jeans
$40
earrings
$10
a. what is the sale price of each item as a terminating or a repeating decimal? show your work.
b. round the price of each item to the nearest cent. what is the total cost of padma’s purchases? show your work.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

x = 2

step-by-step explanation:

if sr parallel to ba then the sides bc and ac are in proportion, that is

= ← substitute values

= ( cross- multiply )

27x = 6(4x + 1)

27x = 24x + 6 ( subtract 24x from both sides )

3x = 6 ( divide both sides by 3 )

x = 2