Shanice and jenny each improved their yards by planting grass sod and ornamental grass. they bought their supplies from the same store. shanice spent $280 on 14 feet of grass sod and 14 bunches of ornamental grass. jenny spent $251 on 12 ft of grass sod and 13 bunches of ornamental grass find the cost of one ft of grass sod and the cost of one bunch of ornamental grass.

Grass sod: $9

Ornamental grass: $11

Explanation:

In order to solve this we first have to set a term for each Grass sod and ornamental grass, we will use X and Y for each one:

Grass sod: X

Ornamental grass: Y

So we create two equations:

14x + 14y=280

12x+13y=251

We can solve this system of ecuations by elimination:

Now we just inser the value of Y into anyone of the two equations:

So we know that the grass rod costs 9 dollars and the ornamental grass 11

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

c. is the answer

by love gaming