A16-ounce bottle of water from store a costs $1.28. the cost in dollars, y, of a bottle of water from store b is represented by the equation y= 0.07x, where x is the number of ounces. what is the cost per ounce of water at each store? which stores bottle of water costs less per ounce?

Store A : $0.08 per ounce ; Store B : $0.07 per ounce. Store´s B bottle cost less per ounce.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

To calculate the cost per ounce for store A, we have to divide the cost of a bottle ($1.28) by the ounces of the bottle (16).

Cost per ounce (A): $1.28/ 16 = $0.08 per ounce

And for B, the expression y= 0.07x represents the cost of a bottle, where x is the number of ounces and 0.07 is the cost per ounce.

Cost per ounce (B); $0.07 per ounce

$0.08 (A) > $0.07 (B)

Store´s B bottle cost less per ounce.

a

step-by-step explanation:

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form