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4 years ago

Kinda sorta maybe need some help ? this is on khan academy as well .

Mathematics

1 answer:

Anna11 [10]4 years ago

6 0

I’m pretty sure it’s -3 because when why is -2 not only can x=0 it can =-3

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NEED THIS ANSWERED ASAP!

Karo-lina-s [1.5K]

<h2>PART A</h2><h3>5-Number-Summary:</h3>

Town A: 3, 4.5, 6, 9, 20

--------------------------

Minimum: 3

Quartile Q1: 4.5

Median: 6

Quartile Q3: 9

Maximum: 20

Town B: 3, 4, 6, 8.5, 9

---------------------------

Minimum: 3

Quartile Q1: 4

Median: 6

Quartile Q3: 8.5

Maximum: 9

---------------------------------------------------------------

<h3>Interquartile Range:</h3>

(Median of each set)

6 <em>(town A)</em> - 6 <em>(town B)</em> = 0

Are they symmetric?

<em>No, I believe not,</em> they don't align center in the same way, according to the pictures I've attached. The one with a short box is Town A, the bigger box is Town B.

5 0

3 years ago

The couch in your living room is old. You decide to recover the couch cushions with new fabric instead of buying a new couch. Th

alexgriva [62]

Answer:

$36.25

Step-by-step explanation:

Surface area: 2*l*w+2*w*h+2*h*l

2*2*2.5+2*2.5*0.5+2*0.5*2

10+2.5+2

14.5 sq. ft.

14.5*2.50=36.25

6 0

3 years ago

A cube has a surface area of 150 cubic meters. What is the length, in meters, of each side of the cube?

Virty [35]

Answer: 5 meters

Step-by-step explanation:

Cubes have six sides. 6x^2=150

150/6=25

Root 25=5

Also that should be square meters because surface area is in square measurements and volume is in cubic measurements

8 0

4 years ago

The endpoints of AB are A(2, 3) and B(8, 1). The perpendicular bisector of AB is CD, and point C lies on AB. The length of CD is

marysya [2.9K]

Comment
If C lies on AB Then it must be the midpoint of AB because CD is the Perpendicular Bisector of AB

Midpoint
A(2,3) B(8,1)
Midpoint formula = (x1 + x2)/2 + (y1 + y2)/2
Midpoint = (2 + 8)/2 + (3 + 1) / 2
Midpoint = 10/2 + 4/2
Midpoint = (5,2) <<<<< answer

Slope AB
slope = (y2 - y1)/(x2 - x1)
slope = (3 - 1) / (2 - 8)
slope = 2/-6 = -1/3

Slope CD
CD_slope * AB_slope = - 1
CD_slope * -1/3 = -1 multiply both sides by - 3
CD_slope * 1 = - 1 * -3
CD_slope = 3 <<<<< Slope CD Answer

Equation CD
Given the midpoint of AB which is C( and the slope of CD
y = 3x + b
2 = 3*5 + b
b = - 13
Equation y = 3x - 13

Using Distance to get D
d^2 = (x1 - x2)^2 + (y2 - y1)'^2
d^2 = (x2 - 5)^2 + (y2 - 2)^2
y2 = 3*x2 - 13
10 = x2^2 - 10x2 + 25 + (3x2 - 13 - 2)^2
10 = x2^2 - 10x2 + 25 + (3x2 - 15)^2
10 = x1^2 - 10x2 + 25 + 9x^2 - 90x2 + 225
10 = 10x2^2 - 100x2 +250
0 = 10x2^2 - 100x2 + 240 Divide through by 10
0 = x2^2 - 10x^2 + 24
0 = (x2 - 6)(x2 - 4)

x2 = 6 or
x2 = 4

Using y2 = 3x - 13
for x2 = 4
then y2 = 3(4) - 13
y2 = - 1

for x2 = 6
y2 = 3*6 - 13
y2 = 5

Possible Answers for D
D = (4,-1)
D = (6,5)

I've included a graph to show a graphical solution.

Please note in a week's time, if no one else answers, you can award a Brainly. This question took over an hour. If someone else answers, please choose one of us.

7 0

4 years ago

Multiplying by 0.25 is the same as decreasing by

Helen [10]

Step-by-step explanation:

multiplying by 0.25 is same as find the 1/4 of a number. it can also be said the number is reduced by 75% of itself or number is reduced by 3/4th of itself.

For example let the number be 100.

0.25*100=25 also 100/4=25 or 100-0.75*100= 25 or, 100-(3/4*100)= 25

6 0

3 years ago