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3 years ago

BRAINLYEST

Mathematics

2 answers:

antoniya [11.8K]3 years ago

8 0

Answer:

Step-by-step explanation:

i think it's MODE 21........

Degger [83]3 years ago

7 0

I can’t rly see the question please make it bigger

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10(3 + 10u) what is the answer?

photoshop1234 [79]

The correct answer is 30+100u. Hope this helps!!

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3 years ago

Read 2 more answers

In the diagram, CE = 12 and BE = 5. Based on the given information, AE =

lubasha [3.4K]

Answer:

12 units

Step-by-step explanation:

From the given figure, it can be seen that AB=BC, thus

From ΔBEC, using the Pythagoras theorem, we have

$(EC)^{2}=(BE)^{2}+(BC)^{2}$

$(12)^2=(5)^2+(BC)^2$

$144=25+(BC)^2$

$119=(BC)^2$

$BC=\sqrt{119} units$

Now, from ΔABE, using the Pythagoras theorem, we have

$(AE)^2=(BE)^2+(AB)^2$

$(AE)^2=25+119$

$(AE)^2=144$

$AE=12 units$

Thus, the measure of AE is 12 units.

8 0

3 years ago

Read 2 more answers

A person takes up 24 inches of space on a stadium bleacher. If one row of bleachers is 150 feet long and there are 20 rows of bl

Feliz [49]

Answer:

1,500 people

Step-by-step explanation:

Remember that

$1\ ft= 12\ in$

Convert ft to in

$150\ ft=150*12=1,800\ in$

Divide the length of a row by the space occupied by one person

$1,800/24=75\ persons$

Multiply by the number of rows to determine the total people that can fit into the stands

$75(20)=1,500\ people$

3 0

3 years ago

You plan to conduct a marketing experiment in which students are to taste one of two different brands of soft drink. Their task

solmaris [256]

Answer:

a) probability that the sample will have between 50% and 60% of the identification correct = 0.498

b) The probability is 90% that the sample percentage is contained 45.5% and 54.5% of the population percentage

c) Probability that the sample percentage of correct identifications is greater than 65% = 0.01

Step-by-step explanation:

Sample size, n = 200

Since the brands are equally likely, p = 0.5, q = 0.5

The Standard deviation, $\sigma_p = \sqrt{\frac{pq}{n} }$

$\sigma_p = \sqrt{\frac{0.5 * 0.5}{200} } \\\sigma_p = 0.0353$

a) probability that the sample will have between 50% and 60% of the identification correct.

$P(0.5 < X < 0.6) = P(\frac{0.5 - 0.5}{0.0353} < Z < \frac{0.6 - 0.5}{0.0353} )\\P(0.5 < X < 0.6) = P( 0 < Z < 2.832)\\P(0.5 < X < 0.6) = P(Z < 2.832) - P(Z < 0)\\P(0.5 < X < 0.6) = 0.998 - 0.5\\P(0.5 < X < 0.6) = 0.498$

Probability that the sample will have between 50% and 60% of the identification correct is 0.498

b) p = 90% = 0.9

Getting the z value using excel:

z = (=NORMSINV(0.9) )

z = 1.281552 = 1.28 ( 2 dp)

Then we can calculate the symmetric limits of the population percentage as follows:

$z = \frac{X - \mu}{\sigma_p}$

$-1.28 = \frac{X_1 - 0.5}{0.0353} \\-1.28 * 0.0353 = X_1 - 0.5\\-0.045+ 0.5 = X_1\\X_1 = 0.455$

$1.28 = \frac{X_2 - 0.5}{0.0353} \\1.28 * 0.0353 = X_2 - 0.5\\0.045+ 0.5 = X_2\\X_2 = 0.545$

The probability is 90% that the sample percentage is contained 45.5% and 54.5% of the population percentage

c) Probability that the sample percentage of correct identifications is greater than 65%

P(X>0.65) = 1 - P(X<0.65)

$P(X$

6 0

4 years ago

What expressions are equivalent to 3(4x+3)?

gtnhenbr [62]

Answer: B, D, E

Step-by-step explanation: Its very easy to check, For B, you notice that it is the same, only the numbers are swapped. In multiplication, this is perfectly fine. For D, I just knew that the answer was 12x+9. And in D, there are 3 4x and 3 threes', so that one was correct. And for E, all you have to do is to multiply accordingly to the distributive property

4 0

3 years ago