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3 years ago

Help me please ? Ill Mark brainlist

Mathematics

2 answers:

S_A_V [24]3 years ago

8 0

Answer:

D. 39000 m

Step-by-step explanation:

13 km * 3 week * 1000 m(=1 km) = 39000m

Tresset [83]3 years ago

7 0

Answer:

ching song

Step-by-step explanation:

blig blong

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There are 115 students in a music club 73 of them are girls what is the ratio of the number of boys and girls

REY [17]

Answer:

73:42

Step-by-step explanation:

1115-73=42

G : B

73 : 42

8 0

3 years ago

In a class of 40 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose

ladessa [460]

Answer:3

Step-by-step explanation:

Given

There are total 40 students in a class

No of students with Pierced Nose n(N)=7

No of students with Pierced ear n(E)=36

and we know using sets

$n\left ( N\cup E\right )=n\left ( E\right )+n\left ( N\right )-n\left ( N\cap E\right )$

where $n\left ( N\cup E\right )=$ Students either nose or ear Pierced

$n\left ( N\cap E\right )=$ no of students having both nose and ear pierced

$40=7+36-n\left ( N\cap E\right )$

$n\left ( N\cap E\right )=43-40=3$

3 0

4 years ago

Determine the elements of the relation A × A if -<br>A = { 1 , 2 , 3 }<br><br>thankyou ~

attashe74 [19]

If X and Y are two sets, then X × Y is the Cartesian product of X and Y, which is the set of all pairs (x, y) such that x ∈ X and y ∈ Y.

This means

A × A = {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3)}

7 0

3 years ago

What is the value of this expression? -2^6-(6)^-2

DENIUS [597]

This would be 31/ over 9 the powers <^

4 0

3 years ago

What is the value of f (6) ?

Marta_Voda [28]

$\huge{ \boxed{ \tt{Solution :-}}}$

$\sf{f(x) = \dfrac{ x^2 - 4x }{20}}$

$\sf{What\: is\: the\: value \:of \: f(6)?}$

Now we solving it :

$\sf { : \implies{f(x) = \dfrac{ x^2 - 4x }{20}}} \\ \\ \sf { : \implies{f(6) = \dfrac{ 6^2 - 4 \times 6}{20}}} \\ \\ \sf { : \implies{f(6) = \dfrac{ 36 - 24}{20}}} \\ \\ \sf { : \implies{f(6) = \dfrac{ 12}{20}}} \\ \\ :\implies{\boxed {\tt{f(6) = \dfrac{ 3}{5}}}}$

$\bf {\therefore{The\:value\:of\:f (6)\:is\:\dfrac{ 3}{5}.}}$

$\rule {307}{2}$

5 0

3 years ago