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umka21 [38]
2 years ago
15

Pls help urgently extra points and mark brainlist

Mathematics
1 answer:
tankabanditka [31]2 years ago
6 0

Answer:

(3+2)×5= 5 power 2

5 power 3= 125

10 power 2 over 2= 50

Step-by-step explanation:

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Are these right before I go on I have a 100 in math #wannakeepit
Serjik [45]
They are all correct

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3 years ago
How many quarts of pure antifreeze must be added to 8 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution
anyanavicka [17]

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

4 0
2 years ago
I WILL GIVE BRAINLIEST!!!
GREYUIT [131]

Answer:

C. -4

I hope this helps!

7 0
3 years ago
Helppoo 10 points! I’ll mark brainliest!
77julia77 [94]

Answer Yes, because you take the answer from 100+45 and subtract 3 to get to 97 and then you add 29 to make the 47 a 74.

Step-by-step explanation:

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2 years ago
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