3 years ago

Will the answer to this expression be POSITIVE or NEGATIVE? - 1 - (-6.5)

Mathematics

1 answer:

Gre4nikov [31]3 years ago

4 0

Answer:

positive ans=5.5

hope it help u

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Is it - or + 60 plz help me

Artemon [7]

+60 two negatives equal a positive

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3 years ago

A room contains three urns: u1, u2, u3. u1 contains 3 red and 2 yellow marbles. u2 contains 3 red and 7 yellow marbles. u3 conta

Archy [21]

Answer:

$\dfrac{11}{30}$

Step-by-step explanation:

Urn U1: 3 red and 2 yellow marbles, in total 5 marbles.

The probability to select red marble is $\dfrac{3}{5}=0.6.$

Urn U2: 3 red and 7 yellow marbles, in total 10 marbles.

The probability to select red marble is $\dfrac{3}{10}=0.3.$

Urn U1: 1 red and 4 yellow marbles, in total 5 marbles.

The probability to select red marble is $\dfrac{1}{5}=0.2.$

The probability to choose each urn is the same and is equal to $\frac{1}{3}.$

Thus, the probability that the marble is red is

$\dfrac{1}{3}\cdot 0.6+\dfrac{1}{3}\cdot 0.3+\dfrac{1}{3}\cdot 0.2=\dfrac{1.1}{3}=\dfrac{11}{30}.$

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3 years ago

Work out the area of this circle witha diameter of 14cm give your answer in terms like and state its unit

zmey [24]

Answer:

154cm2 (rounded to the nearest one)

Step-by-step explanation:

its just the radius (half the diameter) squared (times by itself) then times by pi π, simpified, πR2

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3 years ago

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What is the least common multiples between the following fractions: 1/4 and 1/8

DENIUS [597]

Answer:

lcm

Step-by-step explanation:

2 will be the LCM whereas both denominator we can divide by 2

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3 years ago

If 3,8,9 and x are in proportion find the value of x

Rufina [12.5K]

Answer:

Step-by-step explanation:

since they are in continued proportion the ratio will be

3/8=9/x

do cross multiplication

8*9=3*x

72=3x

72/3=x

24=x

therefore x =24

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3 years ago

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