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ollegr [7]
3 years ago
12

How can you subtract fractions with unlike denominators?

Mathematics
2 answers:
Rama09 [41]3 years ago
8 0

Answer:

No, You can't. You have to make their denominators equal!

-\frac{7}{10}

Step-by-step explanation:

So first, you make their denominators equal!

\frac{1*2}{5*2} =\frac{2}{10}=\frac{1}{5}

Multiplying both the numerator and denominator with the same number results in the same fraction, just un-simplified

So, we input it!

\frac{2}{10} -\frac{9}{10} = -\frac{7}{10}

There you go!

Hope you get better at math!(gets wayyyyyyyyyyy...y more complicated later)

Hope this helps!

See Ya!

P.S. Stay Safe!

ziro4ka [17]3 years ago
7 0

Answer: it would end up being 2/10-9/10 which is -7/10. If you meant it the other way around then it's 7/10.

Step-by-step explanation: with unlike denominators you can't do anything until they're alike. So you would find the least common denominator of both denominators which in this case would be 10. Since we already have one denominator of 10 we have to make the other denominator 10 if we want to continue with the equation. To make the denominator 10 you multiply it by two. You also have to multiply the numerator by 2 because of the balance rule " what you do to the bottom, you must do the top" and vice versa. Anyways that's how you get your answer. Hope this helped!!!

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A superhero is trying to leap over a tall building. The function f(x)=-16x^2+200x gives the superhero's height in feet as a func
Gemiola [76]

Answer:

Since \bigtriangleup \geq 0, the superhero makes it over the building.

Step-by-step explanation:

The height is given by the following function:

f(x) = -16x^{2} + 200x

Will the superhero make it over the building?

We have to find if there is values of x for which f(x) = 612.

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}

x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}

\bigtriangleup = b^{2} - 4ac

If \bigtriangleup < 0, the polynomial has no solutions.

In this question:

f(x) = -16x^{2} + 200x

-16x^{2} + 200x = 612

16x^{2} - 200x + 612 = 0

We have to find \bigtriangleup

We have that a = 16, b = -200, c = 612. So

\bigtriangleup = (-200)^{2} - 4*16*612 = 832

Since \bigtriangleup \geq 0, the superhero makes it over the building.

7 0
3 years ago
I need help, can someone tell me the answer to 13x + 3 - 7x - 1? Please and thank you.
Yuki888 [10]

Answer:

6x+2

Step-by-step explanation:

your combine like terms...

so 13x is teh same as -7x

13x-7x= 6x

3 and -1 are the same as well

3-1=2

so teh answer would be

6x+2

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2 years ago
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A normal distribution with a mean of 74 and a standard deviation of 7.
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Step-by-step explanation:

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