MATHEMATICS MIDDLE SCHOOL

Can someone help me with these questions

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Answer 1

Answer:

Answer:

1. 1/40

2.9/50

3.1/5 =0.2= 20%

i dont know the rest sorry , but is that a dog behind it the paper ?

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Find the mean, median, and mode of the following set.27, 20, 34, 37, 21, 42, 39A)mean: 31.4; median: 35.5; mode: 37B)mean: 31.4; median: 34; no modeC)mean: 36.7; median: 34; no modeD)mean: 36.7; median: 37; no mode

Please answer question number four thank you!

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26( w times w times w less than nvm its less than

On the last day of school, Mrs. Awesome gave jelly beans to her class. She gave each boy as many jelly beans as there were boys in the class. She gave each girl as many jelly beans as there were girls in the class. She brought $400$ jelly beans, and when she finished, she had six jelly beans left. There were two more boys than girls in her class. How many students were in her class?

Answers

Answer:

28 students

Step-by-step explanation:

Let x be the number of girls in the class. There were two more boys than girls in her class, then the number of boys is x + 2.

Mrs. Awesome gave each boy as many jelly beans as there were boys in the class, so each of x + 2 boys got x + 2 jelly beans, so

Number of boys = x + 2

Number of jelly beans each boy got = x + 2

Total number of jelly beans all boys got = (x + 2)(x + 2)

Mrs. Awesome gave each girl as many jelly beans as there were girls in the class, so each of x girls got x jelly beans, so

Number of girls = x

Number of jelly beans each girl got = x

Total number of jelly beans all girls got = (x)(x)

Hence,

Total number of jelly beans class got = (x + 2)(x + 2) + (x)(x)

Mrs. Awesome brought 400 jelly beans, and when she finished, she had six jelly beans left, so she gave 400 - 6 = 394 jelly beans to the calss.

So,

$(x+2)(x+2)+(x)(x)=394\n \nx^2+2x+2x+4+x^2=394\n \n2x^2+4x+4-394=0\n \n2x^2+4x-390=0\n \nx^2+2x-195=0\n \nD=2^2-4\cdot (-195)=4+780=784\n \n√(D)=28\n \nx_(1,2)=(-2\pm 28)/(2\cdot 1)=-15,\ 13$

Number of girls cannot be negative, so x = 13, x + 2 = 15 and total number of students is 13 + 15 = 28

When is a rhombus a rectangle?

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A rhombus is a rectangle when all its angles are right angles.

What is a rectangle?

A rectangle is a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.

Given is a rhombus.

A rhombus is a rectangle when all its angles are right angles. Due to this, the tilt of the vertical sides of rhombus will become 0 degrees.

Therefore, a rhombus is a rectangle when all its angles are right angles.

To solve more questions on rhombus, visit the link below-

brainly.com/question/16739227

#SPJ5

Answer: D

Step-by-step explanation:

They are rectangles when the sides are 90 degrees. :)

Mack designed a water fountain with a square pyramid flowing into a cube. The edges of the bases of the pyramid and the cube have the same length and the heights of the pyramid and the cube are the same. Describe the relationship between the volume of the cube and the volume of the pyramid.

Please help me on this question. There are six questions in total and I did the rest (finding the volume/surface area) but this one I just don't understand. I'm willing to give up 60 of the 70 points I have for help (help that tells me the answer and explains it). Maybe even all 70. Please help if you understand. Thank you, minna.

Answers

volume of pyramid = 1/3 b2h
volume of cube = b3

now , provided pyramid and cube have same edges and same heights.

thus, volume of pyramid = 1/3 b3
volume of cube = b3.

thus, ratio = 1/3b3/ b3 = 1/3.

Thus, volume of pyramid = 1/3volume of cube

$V_(cube)=a^3\ \ \ and\ \ \ V_(pyramid)= (1)/(3) \cdot a^2\cdot h=(1)/(3)a^3\n \n (V_(pyramid))/(V_(cube)) = ((1)/(3)a^3)/(a^3)= (1)/(3)\n \n \nA_(cube)=6a^2\n \nh^2=a^2+( (1)/(2) a)^2\ \ \ \Rightarrow\ \ \ h^2= (5a^2)/(4)\ \ \ \Rightarrow\ \ \ h= (a √(5) )/(2)\n\nA_(pyramid)=a^2+4\cdot (1)/(2)ah=a^2+2a\cdot (a √(5) )/(2) =a^2(1+ √(5)) \n \n (A_(pyramid))/(A_(cube))= (a^2(1+ √(5)) )/(6a^2) = (1+ √(5))/(6)$

Forty tickets were sold for a lottery. two tickets were bought, what are the chances of winning

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This answer is from what I am understanding and sorry for no explanation.

2/40 simplified = 1/20

Ralph bought 6 cds at the cost of $17.75 each how much did the cds cost altogether

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I think its $106.5 just add 17.75 6 times

Multiply 17.75 by 6 to get 106.5$

Other Questions

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Sam wrote this expression to describe the number of apples he gave away to his friends. 12 – a Which situation could be described by this expression? A. Sam does not know how many apples he has. He knows he gave away 12 apples. B. Sam knows he has 12 apples left. He does not know how many apples he gave away. C. Sam knows he has 12 apples left. He gave away half of his apples. D. Sam knows he had 12 apples to start. He does not know how many apples he gave away.

A badminton court has an area of 880 square feet. The width of the court is 20 feet. What is the length of the badminton court?

Hanna walks 1 2/3 miles to school. After school she walks 1 1/2 mikes to work. How many miles does she walk before and after school?