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USPshnik [31]
3 years ago
7

Find 5-(-7)=5+7 simplify

Mathematics
2 answers:
IrinaK [193]3 years ago
6 0

Answer:

12 = 12

Step-by-step explanation:

5 - (-7) = 5 + 7

5 + 7 = 5 + 7

12 = 12

lora16 [44]3 years ago
3 0

Answer:

You already did the question.

Step-by-step explanation:

What's there to simplify?

5+7 = 5+7

It's just recursive.

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Our solar system is approximately 27,000 light-years from the center of the Milky Way. Therefore, what is true when we observe t
aalyn [17]

Answer:

We are observing the galactic center as it was 27,000 years ago

Step-by-step explanation:

The Galactic Center, or Galactic Centre, is the rotational center of the Milky Way. It is 8,122 ± 31 parsecs (26,490 ± 100 ly) away from Earth in the direction of the constellations Sagittarius, Ophiuchus, and Scorpius where the Milky Way appears brightest. It coincides with the compact radio source Sagittarius A*

5 0
3 years ago
the half-life of strontium-90 is approximately 29 years. how much of a 500 g sample of strontium-90 will remain after 58 years​
Yuliya22 [10]

Answer:  125 g

<u>Step-by-step explanation:</u>

A = P_o\cdot e^{kt}\\\\\text{First, use the given information to find k:}\\\\\bullet A=\dfrac{1}{2}P_o\\\\\bullet k = unknown\\\\\bullet t=29\text{ years}\\\\\dfrac{1}{2}P_o=P_o\cdot e^{k(29)}\\\\\\\dfrac{1}{2}=e^{k(29)}\qquad divided\ both\ sides\ by\ P_o\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=ln\bigg(e^{k(29)}\bigg)\qquad applied\ ln\ to\ both\ sides\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=29k\qquad simplified-ln\ and\ e\ cancel\ out\\\\\\\dfrac{ln\bigg(\dfrac{1}{2}\bigg)}{29}=k\qquad divided\ 29\ from\ both\ sides\\\\\\-0.0239=k

\text{Now, use the following in the equation to solve for A:}\\\\\bullet A=unknown\\\bullet P_o=500\\\bullet k=-0.0239\\\bullet t=58\text{ years}\\\\A=500\cdot e^{(-0.0239)(58)}\\\\.\quad=500\cdot e^{-1.386}\\\\.\quad=125

8 0
3 years ago
- 1 1/2 +3 1/2 - 5/8
Irina18 [472]

Answer:

1 3/8

Step-by-step explanation:

Step by step explanation is below. See attachment :)

6 0
2 years ago
Read 2 more answers
Samantha is painting her house. There are a total of 2,261 square feet of surface are to be painted. If she can paint 75 square
Viefleur [7K]

Answer:

c

Step-by-step explanation:

the equation would be C because

A would end up with a negative amount

B is more than she originally has to paint and

D has the wrong coefficient for <em> t</em>.

8 0
3 years ago
А
Vikentia [17]

Answer:180

Step-by-step explanation:

4 0
2 years ago
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