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amm1812
3 years ago
8

Add or subtract the following fractions. write in simplest form.3/4 - 3/10​

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

Answer:

I got 9/20

Hope that helps!

You might be interested in
What common denominator can be used to write the left side as one rational expression?
iris [78.8K]

Answer:

10(10+x)

Step-by-step explanation:

7 0
4 years ago
A car travels 143km in 2hours 45minutes .Find its speed in km / hour​
grin007 [14]

Answer:

52 km/hr

Step-by-step explanation:

Speed equals distance over time.

2 hours 45 minutes = 2.75 hours

S = 143/2.75

S = 52

The car’s speed is 52 kilometers per hour.

7 0
3 years ago
) Determine the probability that a bit string of length 10 contains exactly 4 or 5 ones.
yanalaym [24]

Answer: 0.4512

Step-by-step explanation:

A bit string is sequence of bits (it only contains 0 and 1).

We assume that the  0 and 1 area equally likely to any place.

i.e. P(0)= P(1)= \dfrac{1}{2}

The length of bits : n = 10

Let X = Number of getting ones.

Then , X \sim Bin(n=10,\ p=\dfrac{1}{2})

Binomial distribution formula : P(X=x)=^nC_x p^x q^{n-x} , where p= probability of getting success in each event and q= probability of getting failure in each event.

Here , p=q=\dfrac{1}{2}

Then ,The probability that a bit string of length 10 contains exactly 4 or 5 ones.

P(X= 4\ or\ 5)=P(x=4)+P(x=5)\\\\=^{10}C_4(\dfrac{1}{2})^{10}+^{10}C_4(\dfrac{1}{2})^{10}

=\dfrac{10!}{4!6!}(\dfrac{1}{2})^{10}+\dfrac{10!}{5!5!}(\dfrac{1}{2})^{10}

=(\dfrac{1}{2})^{10}(\dfrac{10!}{4!6!}+\dfrac{10!}{5!5!})

=(\dfrac{1}{2})^{10}(210+252)

=(0.0009765625)(462)

=0.451171875\approx0.4512

Hence, the  probability that a bit string of length 10 contains exactly 4 or 5 ones is 0.4512.

3 0
4 years ago
PLEASE HELP ME FAST!!!
Slav-nsk [51]

Answer:

A) 18:1

Step-by-step explanation:

9 feet = 108

108/6

18

5 0
3 years ago
Which graph describes the relation {(3, –1), (1, –2), (–3, –2), (5, –5)}?
MArishka [77]
This is the coordinates graphed , good luck

4 0
3 years ago
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