Hi there! Hopefully this helps!
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<h2>Answer:
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When you multiply two negatives (-, -,), you are gonna get a positive(+)
<em>[Like making a cross out of two lines].</em>
<h2>Since 3(7) normally <u>
equals 21</u>, that would be the answer for this case.</h2>
Let <em>q</em> be the number of quarts of pure antifreeze that needs to be added to get the desired solution.
8 quarts of 40% solution contains 0.40 × 8 = 3.2 quarts of antifreeze.
The new solution would have a total volume of 8 + <em>q</em> quarts, and it would contain a total amount of 3.2 + <em>q</em> quarts of antifreeze. You want to end up with a concentration of 60% antifreeze, which means
(3.2 + <em>q</em>) / (8 + <em>q</em>) = 0.60
Solve for <em>q</em> :
3.2 + <em>q</em> = 0.60 (8 + <em>q</em>)
3.2 + <em>q</em> = 4.8 + 0.6<em>q</em>
0.4<em>q</em> = 1.6
<em>q</em> = 4
Answer:
4.87805%
Step-by-step explanation:
yuh yw
Answer: i dont know if this is correct but i think the answer is.... tom will have 74 apples
Step-by-step explanation: