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Zielflug [23.3K]
3 years ago
9

- 3/5 + - 3/4 can somebody help plz

Mathematics
2 answers:
Gnesinka [82]3 years ago
8 0
<span>- 3/5 + - 3/4
= (-12/20) = (-15/20) 
= - 27/20
= - 1 7/20</span>
Sliva [168]3 years ago
3 0
<span>- 3/5 + - 3/4 
Multiply the fractions until both fractions have the same common denominator. Also, when you add a negative number, it's basically the same as subtracting that number as well.
- 12/20 - 15/20
Subtract the numerators but NOT the denominators.
Final Answer: -27/20 or -1 7/20 *Both answers are equivalent to each other.</span>
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What is the additive inverse of 46
lianna [129]
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5 0
3 years ago
Read 2 more answers
12(3-2x)=84 solve for x.
OlgaM077 [116]
12(3-2x) = 84

do distributive multiplication:

12(3) + 12(-2x) = 84
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divide -24 to both sides

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7 0
3 years ago
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Solve. Write the solution in interval notation. -2x&gt;-8 and -5x&lt;20.
Novosadov [1.4K]

Answer:

The interval notation of the solution is (-4 , 4)

Step-by-step explanation:

* Let us explain a very important point in solving inequality

- When you multiply or divide an inequality by negative number we

   must reverse the symbol of the inequality

- Ex:

∵ 2 < 3

- If we multiply the both sides of the inequality by -1, then the

  inequality will be -2 < -3 and this is completely wrong, so we must

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∴ -2 > -3

* Now let us solve the problem

∵ -2x > -8

- Divide both sides by -2 and remember to reverse the symbol of the

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∴ x < 4

∵ -5x < 20

- Divide both sides by -5 and remember to reverse the symbol of the

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∴ x > -4

- From both solutions

∴ -4 < x < 4

∴ The solution is {x : -4 < x < 4}

- Interval notation is a way of writing the solutions of inequalities

 ( , ) if x does not equal the end numbers

 [ , ] if x equals the end numbers

 [ , ) , ( , ] if x equals one of the two end numbers

* The interval notation of the solution is (-4 , 4)

4 0
3 years ago
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