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kramer
3 years ago
6

I need help adding and subtracting fractions. I dont really get how you change the denominations. ​

Mathematics
1 answer:
abruzzese [7]3 years ago
3 0

Answer:

Here to help! See explanation

Step-by-step explanation:

Hey there! It's really simple once you get the hang of it, I'll show you!

Example:

\frac{1}{3} + \frac{3}{4}

First, we have to remember that we can't add fractions with different denominators. So we have to look for the least common denominator, also known as the least common multiple.

In this case, the smallest number that both 3 and 4 make is <em>12.</em>

Now, we have to multiply both fractions by what it takes to get to twelve. 3 has to be multiplied by 4, and 4 by 3.

( \frac{1}{3} )*4 = \frac{4}{12} \\\\

(\frac{3}{4} ) *3= \frac{9}{12}

Now that we have the same denominator, all we have to do is add the numerators.

\frac{4}{12} + \frac{9}{12} =\frac{13}{12}  = 1\frac{1}{12}

I hope this helped!

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Please help explanation if possible
posledela

Answer:

y =3x - 5

Step-by-step explanation:

Well one of the way to do this question is the formula given below your question, but for me, i rather do it this way

OK they gave u y=3x - 12

And they say another line is parallel, once u see the word parallel means they have the same angle, same slope, same gradient ( sorry if I give u the wrong terms, since I learn mine in Malay)

So first u got to understand the slope-intercept form

y = mx + c

y is your y coordinate

x is your x coordinate

m is your gradient ( as in how much the line slants)

c is the y - intercept, as in, if u draw a graph, the y-coordinate where your line touches the y-axis (the vertical line)

So since the say the both lines are parallel, so both of their "m" is the same that is 3. Why? Cuz just compare

y = mx + c

y = 3x - 12

Therefore the m is 3

Therefore u alredy got your first value, so put it in your slope intercept form

y = mx + c

y = 3x + c

Now how to find c? Very easy, just put in the value of y and x from the coordinate ( that the line youre finding is on) they gave u, just put the value in

They gave u

(1, - 2)

So when x = 1, y = - 2

Therefore put it in

y = 3x + c

-2 = 3 (1) + c

c = - 5

Since now u have your m and c value, your slope intercept form is done, just put it in

y = mx + c

y = 3x + (-5)

y = 3x -5

6 0
2 years ago
Explain how to estimate 36.8 + 231 two different ways
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Please answer it in two minutes
seraphim [82]

Answer:

(7.5 , 5.5)

Step-by-step explanation:

The midpoint is halfway between the two end points:

Its x value is halfway between the two x values

Its y value is halfway between the two y values

To calculate it:

Add both "x" coordinates, divide by 2

Add both "y" coordinates, divide by 2

3 0
3 years ago
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