The table shows an online store's shipping rates. you want to buy a 159-pound treadmill. the online price of the treadmill is $110 less than the price of the same treadmill at a local fitness store, but you have to pay shipping. how much can you save by buying the treadmill online with the slowest shipping instead of buying it in the local store?

delivery time: shiping rate:
3 - 5 days $0.49/lb
2 days $0.89/lb
1 day $1.89/lb

you save $32.09

Step-by-step explanation:

You want to buy a 159-pound treadmill. The online price of the treadmill is $110 less than the price of the same treadmill at a local fitness store, but you have to pay shipping.

If you decide to buy at the online price, the slowest shipping is 3 - 5 days at $0.49/lb. This means that the cost of shipping the 159 pound treadmill would be

159 × 0.49 = $77.91

If x represent the price of the thread mill at the local fitness store, then the online price would be x - 110

Since the shipping cost is $77.91, then the total cost of the treadmill when you buy online would be

x - 110 + 77.91 = x - 32.09

The amount saved by buying the treadmill online with the slowest shipping instead of buying it in the local store would be

$32.09

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)