Can someone help me it’s due today

1 quart must be added

Step-by-step explanation:

To do this, set up an equation.

Let x be the number of quarts of antifreeze to be added. Then, you know that the new solution will have a total of 4 quarts with 2/5 of it being antifreeze, so would be the amount of antifreeze. Another way to represent the amount of antifreeze is because the original mixture has 3/5 of quart of antifreeze, while the added stuff is fully antifreeze.

Now, you just solve the equation:

multiply both sides by 5

Use the distributive property on the left

subtract 2x from both sides

subtract 3 from both sides

divide both sides by 3

Therefore the answer is 1 quart

i'm assuming it's looking for the missing length, which should be 4cm

hope this !