Question

The table below shows the combination of a dry prepackaged mix and water to make concrete. The mix says for every 1 gallon of water stir 60 pounds of dry mix. We know that 1 gallon of water is equal to 8 pounds of water. Using the information provided in the table, complete the remaining parts of the table.

Answer 1

@e.mccormick

Answer 2

The first one for the dry mix I for 60 and if you add 8 it is 68.
The second one the total is 85.

Answer 3

So from our question, we know for every 1 gallon of water, we use 60 pounds of dry mix and that 1 gallon = 8 pounds. Hence the ratio is 8:60 of water to dry mix. Let's get some algebra in here: let D= dry mix, W=water and T=total. We know D+W=T and we also know that D=7.5W, so we can write the equation as D+7.5D=8.5D=T. We know T in the third row, can you tell me what D is? What about W?

Answer 4

Where did you get 7.5 from?

Answer 5

@tom982

Answer 6

The ratio of water to dry mix is 8:60, or 1:7.5 :)

Answer 7

Can you teach me that using proportions because we are in the proportions unit?

Answer 8

@satellite73

Answer 9

It's the same thing :) Proportions are built from ratios. We know there's 8 pounds of water to every 60 pounds of dry mix, so there's 1 pound of water to 60/8=7.5 pounds of dry mix.

Answer 10

Ratios are just mathematical ways of describing proportions

Answer 11

Thank you. bye

Answer 12

tom982 "Ratios are just mathematical ways of describing proportions"

No. Both ratios and proportions are mathematical already. Their relationship is even simpler.

A ratio is two or more numbers that are in a linked relationship. They are shown in the form of a:b:c etc. The : is the separator. A ratio of two numbers is also commonly seen as a fraction.

A proportion is an equality between two ratios. a:b = c:d