What is the sales tax if an item is 7$ and with tax it's 7.48 what percent is of the sale tax is being charged

0.48 ; 6.8571428%

Step-by-step explanation:

Given that:

Cost of item = $7

Cost of item including sales tax = $7.48

The sales tax = (cost of item including sales tax - cost of item)

Sales tax = $7.48 - $7 = $0.48

Sales tax percent :

Let sales tax percent = x

x% of item cost = sales tax

x/100 * 7 = 0.48

0.01x * 7 = 0.48

0.07x = 0.48

x = 0.48 / 0.07

x = 6.8571428

Sales tax percent = about 6.858

.069 (6.9%)

Step-by-step explanation:

7.48-7.00=.48 sales tax

.48/7.00=.069 sales tax rate or 6.9%

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)