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egoroff_w [7]
3 years ago
9

What is one intothirds -4/5

Mathematics
1 answer:
Sphinxa [80]3 years ago
7 0

Answer: 13/15


Step-by-step explanation:

1  2/3 - 4/5

Use LCD or least common denominator:

1  10/15 - 12/15 =

25/15 - 12/15 =

13/15

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If x and y are integers greater than 1, is x a multiple of y ? (1) \small 3y^{2}+7y=x (2) \small x^{2}-x is a multiple of y. Sta
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Answer:

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

Step-by-step explanation:

A multiple of a number is obtained after multiplying the number by an integer.

Here,

x, y are any two integers greater than 1,

(1) We have,

\small 3y^{2}+7y=x

\implies y(3y+7) = x

∵ y is an integer ⇒ 3y + 7 is also an integer,

⇒ y × an integer = x

That is, when we multiply y by a number we obtain x,

∴ x is a multiple of y.

Thus, statement (1) ALONE is sufficient.

(2),

\small x^{2}-x\text{ is a multiple of y}

I.e.

y\times a = x^2-x, where a is an integer,

\implies y\times a = x(x-1)

∵ x and x - 1 are disjoint numbers,

There are three possible cases,

Case 1 : x is multiple of y

Case 2 : (x-1) is a multiple of y,

Case 3 : neither x nor x - 1 are multiple of y but their product is multiple of y,

Thus, statement (2) is not sufficient.

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A track team has 64 members. There are 18 more boys than girls on the team. How many girls are on the track team?
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Step-by-step explanation:

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