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stellarik [79]
3 years ago
8

Help pls pls pls pls

Mathematics
2 answers:
inna [77]3 years ago
7 0

Answer:

A

Step-by-step explanation:

zaharov [31]3 years ago
4 0

Answer:

length of diagonal d is 50 m. (first option is correct)

Step-by-step explanation:

using pythagoras theorem

here 40 and 30 are the legs of the triangle so let them be a and b respctively.

And d is the hypotenuse so let it be c

a^2 + b^2 = c^2

40^2 + 30 ^2 = d^2

1600 + 900 = d^2

2500 = d^2

\sqrt{2500} = d

50 = d

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X/3=x+2/5 soo...x=___
Stolb23 [73]
X/3 = x + 2/5....multiply everything by common denominator of 15
5x = 15x + 6
5x - 15x = 6
-10x = 6
x = -6/10 reduces to - 3/5

or...
x/3 is the same as 1/3x

1/3x = x + 2/5
1/3x - x = 2/5
1/3x - 3/3x = 2/5
-2/3x = 2/5
x = 2/5 * -3/2
x = - 6/10 which reduces to - 3/5
7 0
3 years ago
Roberto has $71 to buy baseballs for his little league team. Each baseball
Daniel [21]

Answer:

10

Step-by-step explanation:

he can buy 10 because 7×10=70

8 0
3 years ago
Read 2 more answers
Please Helppppp☺️☺️☺️☺️☺️
pishuonlain [190]
Hi there!

Since one of the angles in this set of 2 lines is a right angle, we know that every other angle is a right angle because vertical angles are congruent and that because each line has a total of 180 degrees.

Thus, Angle NDA and RDY are both 90 degrees and add up to 180 degrees.

Since the two angles add up to 180, they are supplementary angles.

Also, we should notice that those two angles are across each other. Thus, they are also vertical angles.

Your answers are choices B and C.

Have an awesome day! :)
6 0
3 years ago
Stop blocking me cuz im doing my work amd i pay for this soooo stop blocking meeeeeereeeee
laiz [17]
Ok?.....................
6 0
2 years ago
Read 2 more answers
Since the area under the normal curve within two standard deviations of the mean is 0.95, the area under the normal curve that c
alukav5142 [94]

Answer:

X \sim N (\mu ,\sigma)

And for this case we know this condition:

P(\mu-2\sigma

By the complement rule we know that:

P(X< \mu -2\sigma \cup X>\mu +2\sigma) = 1-0.95=0.05

But since the distribution is symmetrical we know that:

P(X\mu +2\sigma) = 0.025

So then the statement for this case is FALSE.

b. False

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

For this case if we define the random variable of interest X and we know that this random variable follows a normal distribution:

X \sim N (\mu ,\sigma)

And for this case we know this condition:

P(\mu-2\sigma

By the complement rule we know that:

P(X< \mu -2\sigma \cup X>\mu +2\sigma) = 1-0.95=0.05

But since the distribution is symmetrical we know that:

P(X\mu +2\sigma) = 0.025

So then the statement for this case is FALSE.

b. False

5 0
4 years ago
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