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Kitty [74]
3 years ago
6

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
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