All categories

3 years ago

How do you do a subtraction fraction

Mathematics

2 answers:

NemiM [27]3 years ago

8 0

3/4−2/5=7/20

Solution with Steps

3/4−2/5=?

The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

LCD(3/4, 2/5) = 20

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

(3/4×5/5)−(2/5×4/4)=?

Complete the multiplication and the equation becomes

15/20−8/20=?

The two fractions now have like denominators so you can subtract the numerators.

Then:

15−8/20=7/20

This fraction cannot be reduced.

Therefore:

3/4−2/5=7/20

Solution by Formulas

Apply the fractions formula for subtraction, to

3/4−2/5

and solve

(3×5)−(2×4)/4×5

=15−8/20

=7/20

Therefore:

3/4−2/5=7/20

Airida [17]3 years ago

5 0

Answer:

divide top from bottom

Step-by-step explanation:

You might be interested in

HELPPPP MEEEE PLEASE!!!!

creativ13 [48]

Answer:

Step-by-step explanation:

3 0

2 years ago

Can someone please solve

Shkiper50 [21]

Take a look at the photo

6 0

3 years ago

75 POINTS Need an immediate answer please brainliest will be given! A train left a station travelling to a city at 30 mph. The t

yaroslaw [1]

The value of distance between the station and the city in terms of miles which train and car travelled at interval of 2 hours is 129.6 miles.

<h3>What is the rate of speed?</h3>

The rate of speed is the rate at which the total distance is travelled in the time taken. Rate of speed can be given as,

r=d/t

Here, (d) is the distance travelled by the object and (t) is time taken but the object to cover that distance.

The train traveled 1/3 of the distance at 30 mph and the remaining distance at 40 mph. Let <em>t</em> is the time the train has taken to travel and x is the distance it travelled. Thus,

$t=\dfrac{\dfrac{1}{3}x}{30}+\dfrac{\dfrac{2}{3}x}{40}\\t=\dfrac{x}{90}+\dfrac{x}{60}\\t=\dfrac{2x+3x}{180}\\t=\dfrac{5x}{180}\\t=\dfrac{x}{36}$

After two hour a car left the same station traveled the first 3 hours at 35 mph and the remaining distance at 51 mph. Let <em>t</em> is the time the car has taken to travel and x is the distance it travelled. Thus,

$t+2=3+\dfrac{(x-3\times35)}{51}$

As t is same, thus put the value of t in this equation,

$\dfrac{x}{36}=3-2+\dfrac{(x-3\times35)}{51}\\\dfrac{x}{36}=3-2+\dfrac{(x-3\times35)}{51}\\\dfrac{x}{36}=1+\dfrac{(x-105)}{51}\\\dfrac{x}{36}=\dfrac{(51+x-105)}{51}\\51x=36x-54\times36\\51x-36x=1944\\x=\dfrac{1944}{15}\\x=129.6$

Thus, the value of distance between the station and the city in terms of miles which train and car travelled at interval of 2 hours is 129.6 miles.

Learn more about the rate of speed here:

brainly.com/question/359790

#SPJ1

6 0

2 years ago

The point P on the circle x2 + y2 = r2 that is also on the terminal side of an angle θ in standard position is given. Find the i

Brut [27]

Okay so you do not really need the circle equation. if you make a triangle with it's x length as 3 and it's y length as 4, you will be able to find the third length. Do Pythagorean theorem to find the hypotenuse.
the hypotenuse will be five after you calculate it.

sin is opposite over hypotenuse or Y over R

so... the sin is 4/5

make sure you know what quadrant your triangle is in for the negatives

6 0

3 years ago

What is 6x729 and how would u do the math in the best way ?

sleet_krkn [62]

The answer is 4,374 and the math is quite simple. A calculator

5 0

3 years ago

Read 2 more answers