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Sever21 [200]
3 years ago
10

PLEASE AWNSER Simplify negative 4 over 5 ÷ 3 over negative 2.

Mathematics
1 answer:
GarryVolchara [31]3 years ago
8 0

Answer:

8/15

Step-by-step explanation:

The reason is because to multiply, you take the reciprocal of the fraction...

So

4/5/3/-2, right? So that's basically -4/5 ÷ 3/-2 so 4/5 * -2/3. The reciprocal of a fraction is literally just flipping it. Now, you know how to multiply, right?

-4/5 * -2/3 = (you can't simplify) 8 (negative times negative = positive) / 5*3

so 8/5*3 = 8/15. 8/15 is 0.53333, or you can just keep it as a fraction.

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6x+3(4x-2)=5(2x-8) the answer is -17/4 but can someone explain how to get that answer? plz help lol​
Sergeu [11.5K]

Answer:

<h2>x =  -  \frac{17}{4}</h2>

Step-by-step explanation:

6x + 3(4x - 2) = 5(2x - 8)

Expand the terms in the bracket and simplify

That's

6x + 12x  - 6 = 10x - 40 \\ 18x - 6 = 10x - 40

Using the subtraction property subtract 10x from both sides of the equation

18x - 10x - 6 = 10x - 10x - 40 \\ 8x - 6 =  - 40

<u>Add 6 to both sides of the equation</u>

8x + 6 - 6 =  - 40 + 6 \\ 8x =  - 34

<u>Divide both sides by 8</u>

\frac{8x}{8}  =  -  \frac{34}{8}

<u>Reduce the fraction with 2</u>

We have the final answer as

x =  -  \frac{17}{4}

Hope this helps you

7 0
3 years ago
A solid cylinder has a radius of 4.9 cm and a height of 3.5 cm. Work out the total surface area of the cylinder. Give your answe
Novosadov [1.4K]

Answer:

252 cm²

Step-by-step Explanation:

=>Given:

r = 4.9 cm, and h = 3.3 cm of a solid cylinder, π = 3.14

=> Required:

Total Surface Area (T.S.A) = 2πrh + 2πr²

T.S.A = 2*3.14*4.9*3.3 + 2*3.14*4.9²

= 101.5476 + 150.7828

= 252.3304

= 252 cm² (approximated)

8 0
3 years ago
If you pay $3.36 in tax, what was the original price at an 8% sales tax
yanalaym [24]

Answer:

  • $42

Step-by-step explanation:

<u>Given</u>

  • 8% = $3.36
  • 100% = x

<u>Cross multiply and solve for x:</u>

  • x = $3.36*100/8 = $42
4 0
3 years ago
An observer took a time-exposure photograph of polaris and five nearby stars. how many hours were required to show their star pa
olga55 [171]
Photographing stars requires you to keep your exposure open for a long time. Taking pictures of star trails would take about 30 minutes to three hours. If you multiply that for the 6 stars stated above in the problem then you would be needing that much time if the stars were close and approximately 3 to 18 hours capture their star trails if they were far apart from each other.
5 0
3 years ago
A certain solution of salt water is 10% salt and weighs 50 pounds. more salt must be added to produce a solution that is 25% sal
Semenov [28]

Answer

7.5 pounds

Step-by-step explanation:

Since adding x grams of salt will bring th percentage of the salt to 25

Hence. 10% of the 50 gram gives. 5 gram initial salt before it is added.

5+ x/ 50 * 100= 25/

5+x /50 = 0.25

5+x = 12.5

X= 12.5- 5

X= 7.5pounds

8 0
3 years ago
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