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Aleonysh [2.5K]
3 years ago
9

Can anyone help me to understand how u add,subtract,multiply and divide fractions like explain how u do it using an example:) Pl

z and thx
Mathematics
2 answers:
kotykmax [81]3 years ago
4 0
Adding fractions:
Lets say you have two fractions like 1/2 and 1/3. To add them, you have to make the denominator the same. So we find the least common multiple of 2 and 3, which is 6, so we multiple 1/2 by 3/3 so we have 3/6 without changing the value, and we multiple 1/3  by 2/2 to have 2/6. Then we add the numerators and have 5/6.

Subtraction fractions:
Same thing as adding, just subtracting instead.
Both need to make sure you have the same denominator.

Multiplying fractions:
This is the most simple. All you do is multiply the numerators and the denominators. So if you have 5/6 and 3/4, you multiply the numerators to have 15, the denominators to have 24, and so you have 15/24, simplified to 5/8.

Dividing fractions:
If you have 5/6 divided by 3/4, you flip the 3/4 to 4/3, and you multiply that with 5/6.
dolphi86 [110]3 years ago
4 0
4/3 + 4/3 = 8/3
_________________________
5/3 - 4/3 = 1/3
_______________________________

5/3 divided by 4/2

5/3 x 2/4 = 10/12
_______________________________

2/3 + 3/6
4/6 + 3/6 = 7/6
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If you get a sneak peak at the salary list of your job and realize you are in the lowest bracket, which is the lowest 1%, what i
hoa [83]

Answer:

z=-2.33

And if we solve for a we got

a=48000 -2.33*5500=35185

And for this case the answer would be 35185 the lowest 1% for the salary

Step-by-step explanation:

Let X the random variable that represent the salary, and for this case we can assume that the distribution for X is given by:

X \sim N(48000,5500)  

Where \mu=48000 and \sigma=5500

And we want to find a value a, such that we satisfy this condition:

P(X>a)=0.99   (a)

P(X   (b)

We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.01 of the area on the left and 0.99 of the area on the right it's z=-2.33. On this case P(Z<-2.33)=0.01 and P(z>-2.33)=0.99

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-2.33

And if we solve for a we got

a=48000 -2.33*5500=35185

And for this case the answer would be 35185 the lowest 1% for the salary

7 0
3 years ago
During a sale at the electronics store, movies sold for $3 and CDs sold for $2.50. Isla spent $19 and bought a total of 7 movies
Vinvika [58]
She bought 4 Movies and 3 CDs so she spend $19.50 bc 3+3+3+3=12 so 2.50+2.50+2.50=7.50 so 7.50+12=19.50
3 0
3 years ago
I am a 3-digit decimal. The sum of my digits is nine. One of my decimal digits is 0. I have a 3 in my tenths place. Who am I?
dezoksy [38]
.360 or .306
Because 3 is in the tenths place, there is a 0, and 3+6+0= 3+6=9 the sum of all the digits. And it’s a three digit decimal.
6 0
3 years ago
Please answer this correctly
Vlad [161]

Answer: 1/4

Step-by-step explanation:

The cheesiest recipe would be 1 cup and the least cheesy recipe would be 3/4 cups

1 - 3/4 = 1/4

3 0
3 years ago
Read 2 more answers
Which inequality is NOT true if y = -5?
sertanlavr [38]

Answer:

c is the answer

Step-by-step explanation:

solution

3y + 9 \geqslant  - 15

3( - 5) + 9 \geqslant  - 15

- 15 + 9 \geqslant  - 15

- 6 \geqslant  - 15

therefore the equation is not true

6 0
3 years ago
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