Aregular tube of toothpaste costs $2.50 for 3.2 ounces. a travel size tube costs $1.00 for 1.2 ounces. compare the prices and weights using percent to decide which is better to buy

The travel size costs 6 % as much as the regular size. Thus the regular size would be more economical and thus a better buy

Step-by-step explanation:

step 1

Find out the unit rate of a regular  tube of toothpaste

we know that

To find out the unit rate, divide the total cost by the total weight

so

step 2

Find out the unit rate of a travel size tube of toothpaste

we know that

To find out the unit rate, divide the total cost by the total weight

so

step 3

Find out the percent of increase

we have that

The unit rate represent the 100%

so by proportion

Find out what percentage represent the difference ($0.83-$0.78=$0.05 per ounce)

therefore

The travel size costs 6 % as much as the regular size. Thus the regular size would be more economical and thus a better buy

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply