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3 years ago

Ninety percent of the seats of a flight are filled. There are 240 seats. How many seats are filled?

Mathematics

1 answer:

antoniya [11.8K]3 years ago

3 0

Answer:

216 seats are filled

Step-by-step explanation:

240-90%=24

24+216=240

thats how you know 216 is correct

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Need help number 13 <br><br>4 grade answer

Vedmedyk [2.9K]

I dont see anything maybe you forgot to add the answer'

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3 years ago

Evaluate the expression for x=5, y=3,and z=1/4. <br> 5x−6y+20z/4yz

Anna11 [10]

Just substitute each number into the expression:
5(5) - 6(3) + 20(1/4)/4(3)(1/4) = 25 - 18 + 5/3 = 7 + 5/3 = 26/3 or 8 and 2/3.

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4 years ago

Read 2 more answers

A survey found that 8 out of 10 parents approved of the new principal’s performance. If 4 parents name are chosen with replaceme

Natasha2012 [34]

Answer:

The probability is 0.044

Step-by-step explanation:

Step-by-step explanation:

Let p be the probability that the new principal’s performance is approved.

This is obtainable from the survey and it is 8/10 = 0.8

Let q be the probability that the new principal’s performance is disproved.

That will be;

1 - q = 1- 0.8 = 0.2

To calculate the probability that 14 parents names are chosen at random and they all

approve of the principal’s performance, we use the Bernoulli approximation of the binomial theorem.

That will be;

14C14 * p^14 * q^0

= 1 * 0.8^14 * 0.2^0

= 0.043980465111 which is approximately 0.044

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3 years ago

Two congruent 30-60-90 triangles are placed,as shown,so that they overlap partly and their hypotenuses coincide. If the hypotenu

Ede4ka [16]

Answer: The area common to both triangle is 31.77 sq. cm.

Step-by-step explanation:

Since we have given that

30-60-90 triangles are placed.

So, the ratio of sides would be

$1:\sqrt{3}:2$

Since Hypotenuse = 12 cm

So, it becomes,

$2x=12\\\\x=\dfrac{12}{2}=6$

So, Base would be

$x=6\ cm$

and Perpendicular would be

$\sqrt{3}x=6\sqrt{3}$

So, Area common to the both triangles would be

$\dfrac{1}{2}\times base\times height\\\\=\dfrac{1}{2}\times 6\times 6\sqrt{3}\\\\=18\sqrt{3}\\\\=31.177$

Hence, the area common to both triangle is 31.77 sq. cm.

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3 years ago

Guys pls help me im failing my grade and i really need help plsssss and dont do it for the points

Nataliya [291]

Answer:

simplified: $\frac{3}{5}$

unsimplified: $\frac{12}{20}$

Step-by-step explanation:

Since the fractions have the same denominator, all we have to do is subtract the numbers in the numerator:

15 - 3 = 12

The difference of the two fractions is $\frac{12}{20}$ . To simplify this answer, divide both the numerator and the denominator by 4:

12/4 = 3

20/4 = 5

The difference in simplified form is $\frac{3}{5}$ .

I hope this helps. :)

6 0

3 years ago