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3 years ago

Please help me BRAINLIEST+STARS+THANKS+POINTS

Mathematics

1 answer:

LUCKY_DIMON [66]3 years ago

7 0

Hello, well there are a few ways to write this. Here is one outlook.

Bruce bought three boxes of tiles with the same number of tiles in each.

x = number of tiles

3 = number of boxes

3x = total number of tiles.

Make note, the problem is asking for an expression for how many tiles he used and not the total number of tiles he has. Anyways, the problem then tells us he had to go get 3 more boxes but he used only 2 tiles out of the last box. So he used 2x + 2 tiles We put this together and we have

3x + 2x + 2

5x + 2

Number of tiles Bruce used = 5x + 2

We do the same for Felicia:

She gets 5 boxes, which = 5x. Then she had to go back and just get 5 tiles. So we have:

5x + 5

Number of tiles Felicia used = 5x + 5

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-18, 10, -20, -11, 9, 18 Mean Median Mode Range

Vlada [557]

Mean = -2

Median = -1

Mode = Nil

Range = 38

Step-by-step explanation:

Given data is:

-18, 10, -20, -11, 9, 18

Arranging the data in ascending order

-20, -18, -11, 9, 10, 18

Mean:

Mean is given by the formula

$Mean=\frac{Sum}{items}$

Items are: 6

$Mean = \frac{-20-18-11+9+10+18}{6}\\= \frac{-12}{2}\\= -2$

Mode:

Mode is the most frequent value in the data. So,

As there is no value repeated in the data. There is no mode

Median:

Median is the middle value of the data. As the no. of data value are even,

the average of middle 2 values is mode.

Note that the data has to be arranged in ordered to find median

Here,

$Median = \frac{-11+9}{2}\\=\frac{-2}{2}\\= -1$

Range:

Range is the difference between the largest and smallest value of the data

Here

Largest value = 18

Smallest value = -20

So,

$Range = Largest\ value-Smallest value\\= 18-(-20)\\= 18+20\\=38$

Hence,

Mean = -2

Median = -1

Mode = Nil

Range = 38

Keywords: Data, Median

Learn more about statistics at:

#LearnwithBrainly

3 0

3 years ago

Solve the equation by completing the square

Ilya [14]

Answer:

We got the quadratic equation:

$x^2+8x-3=0$

Solving by completing the square:

$x^2+8x-3=0\\x^2+8x+16-16-3=0\\(x+4)^2-16-3=0\\(x+4)^2-19=0\\(x+4)^2=19\\x+4=\pm \sqrt{19} \\x=-4\pm \sqrt{19} \\\\x_{1} =-4+\sqrt{19} \\x_{2} =-4-\sqrt{19}$

Therefore, the answer is letter C

4 0

4 years ago

The sum of two numbers is 61, the difference is 35. What are the numbers?

saveliy_v [14]

Answer:

13 & 48

Step-by-step explanation:

Hope that helps!

4 0

3 years ago

Does the table shows a proportional relationship

Olenka [21]

Answer:

I would say yes

Step-by-step explanation:

If I'm not right I apologize.

3 0

3 years ago

this is easy but i'm lazy someone explain how to find the solution to an equation like (x+1)(2x-3) or (x-8)^2 IM GIVING 65 POINT

SVETLANKA909090 [29]

Answer:

make equation = 0

Step-by-step explanation:

In first case your equation is factored so just = 0

(x+1)(2x-3) = 0

Product is zero if any factor is zero so (x+1) = 0, (2x-3) = 0

Solve for x: x= -1, x= 3/2

If (x-8)^2 is given than you need to factor it first and then do the same as in first example.

(x-8)^2 = (x-8)(x-8)

(x-8)=0 , x=8

This is double zero.

3 0

3 years ago