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VARVARA [1.3K]
4 years ago
12

Help me please, I need help

Mathematics
1 answer:
Natalija [7]4 years ago
5 0

Answer:

+ 5.90

Because -5.90 in rational value is positive 5.90

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What is the following is the solution to the equation 25^(z+2) = 125
maksim [4K]

First, rewrite the equation 25^{z+2} = 125 with the base equal to 5. Note that:

  • 25=5^2;
  • 125=5^3;
  • 25^{z+2}=(5^2)^{z+2}=5^{2\cdot (z+2)}.

Then

5^{2\cdot (z+2)}=5^3.

Since the bases are equal, you have that powers are equal too:

2\cdot (z+2)=3,\\ \\2z+4=3,\\ \\2z=3-4,\\ \\2z=-1,\\ \\z=-\dfrac{1}{2}.

Answer: z=-\dfrac{1}{2}.


3 0
4 years ago
Find a substance half-life in days. round your answer to the nearest tenths
jeka57 [31]
A 33 gram sample has k value of .1124
(Actually I think the problem SHOULD be worded: A 33 gram sample has k value of -.1124/days)

See attached graphic:
Half-Life = ln (.5) / k
Half-Life = -.693147 / -.1124/days
Half-Life = <span> <span> <span> 6.1667882562 </span> </span> </span> days

Source:
http://www.1728.org/halflif2.htm





3 0
3 years ago
Read 2 more answers
One batch of cookies calls for 2 cups of oil, 4 cups of sugar, 1.5 cups of sugar, 1 cup of baking soda, and 1 cup of chocolate c
hichkok12 [17]
He can make 2 batches of cookies. I'm not sure about the leftover cups because you wrote sugar twice 
4 0
3 years ago
1). Solve for n n - 63 = 126 *
Zinaida [17]

Answer:

n=189

Step-by-step explanation:

n-63=126\\n=126+63\\n=189

I hope this helps! :)

Brainliest? ✨

4 0
2 years ago
The input value 2.
Irina18 [472]
Your answer is 9.

Since you have

2(2)^2 you get 2(4) which is 8.

Then you have -3(2) which is -6.

Lastly you have the 7.

When you add it up you get.

9
5 0
3 years ago
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