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3 years ago

There is a bag filled with 3 blue and 4 red marbles.

Mathematics

1 answer:

IrinaK [193]3 years ago

4 0

Answer:16/21

Step-by-step explanation:

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If sin(x) = cos(y) for acute angles x and y, how are the angles related?

Vesnalui [34]

Answer:

b. complementary

Step-by-step explanation:

-Complementary angles are angles that add up to 90°.

-These are usually the two acute angles in the right triangle.

#To verify, lets take the two angles 30° and 60°:

$Cos \ 60\textdegree=0.5\\\\Sin \ 30\textdegree=0.5\\\\\therefore Sin \ 30\textdegree=Cos \ 60 \textdegree=0.5$

#We can reverse as:

$Sin \ 60\textdegree=0.86603\\\\Cos \ 30\textdegree=0.86603\\\\\therefore Sin \ 60\textdegree=Cos \ 30\textdegree=0.86603$

Hence, two angles are said to be complimentary if they sum up to 90°.

6 0

3 years ago

If X + 50% of x = 99 what is X?

anastassius [24]

Answer:

x= 66

Step-by-step explanation:

if you set up the equation mathematically, it would be x+0.5x=99, because 50% is essentially just 0.5.

so, now that you have the equation, you have to add like terms, so it would be 1x+0.5x=99, and 1+0.5 is 1.5, so youre left with the equation 1.5x=99.

from there, you solve for x by dividing each side by 1.5:

1.5x=99

/1.5 /1.5

x=66

im sorry if this didnt make much sense, but i hope this helped!! :D

8 0

3 years ago

Supplementary angles are two angles whose measures have a sum of 180∘. What is the value of x? Write and solve an equation for x

Evgen [1.6K]

I is a good friend and a good uuuuuuyyuyhyyytfikh..

8 0

3 years ago

PLZ HELP 20 POINTS!!!!!!!! WILL PUT BRAINLIEST!!!!!!!!!!!

sashaice [31]

I think is B but I have to work this out

6 0

4 years ago

Read 2 more answers

Last year, a person wrote 126 checks. Let the random variable x represent the number of checks he wrote in one day, and assume

Arisa [49]

Answer: The mean number of checks written per day $=0.3452$

Standard deviation $=0.5875$

Variance $=0.3452$

Step-by-step explanation:

Given : The total number of checks wrote by person in a year = 126

Assume that the year is not a leap year.

Then 1 year = 365 days

Let the random variable x represent the number of checks he wrote in one day.

Then , the mean number of checks wrote by person each days id=s given by :-

$\lambda=\dfrac{126}{365}\approx0.3452$

Since , the distribution is Poisson distribution , then the variance must equal to the mean value i.e. $\sigma^2=\lambda=0.3452$

Standard deviation : $\sigma=\sqrt{0.3452}=0.5875372328\approx0.5875$

6 0

4 years ago