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BlackZzzverrR [31]
3 years ago
5

-x^2+2x-1 factor and please show work

Mathematics
1 answer:
torisob [31]3 years ago
4 0

x = 1

-x^{2} +2x-1=0\\-(x-1)^{2} \\x=1

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Simplify 14/15 / 7/30​
EleoNora [17]

Answer:

it's just 4

Step-by-step explanation:

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4 0
3 years ago
I need help ASAP!!
steposvetlana [31]
 Best Answer:<span>  </span><span>A. Mode 
B. Median 
C. Mean 

the other two are not measures of central tendency. 
Data: 
4+9/12, 5+3/12, 5+4/12,5+7/12,5+3/12, 5+9/12,6+0/12, 5+4/12,6+0/12, 6+1/12,5+7/12, 5+5/12, 4+5/12 

4.4167, 4.75, 5.25{2}, 5.3333{2}, 5.4167, 5.5833{2}, 5.75, 6{2}, 6.0833 

n= 13; Σx= 70.75; Σx²= 387.8403; Σx³= 2140.408; Σx^4= 11886.2257 
σ= 0.4638; σn-1= 0.4828; Variance=σ²= 0.2152; (σn-1)²= 0.2331 
Mean(μ)= 5.4423; range= 1.6667; mid-range= 5.25; median= 5.4167; No Mode Probably right skewed. 
Five number summary: Q0= 4.4167, Q1= 5.25, Q2= 5.4167, Q3= 5.875, Q4= 6.0833, IQR= 4.875</span>
8 0
4 years ago
A thin layer of paint is 7x10^-7 m thick. In​ contrast, a coin is 3.43 x 10^-3 m thick. How many layers of paint are in a stack
faltersainse [42]
There's 4 layers of paint cause you should just add 4 to 3.43 and you get 7.43 x 10^-7..?
7 0
3 years ago
Barry made a model to show multiplication of a fraction by a fraction. What multiplication sentence does the model represent?
artcher [175]
Im guessing 12 over 15 
4 0
4 years ago
Read 2 more answers
HELP ASAP !!
Aleks [24]

Answer:

Step-by-step explanation:

total money = $2.25 = 225 cents

types of denomination in coins or cents are dimes and nickels

dime = 10 cents , nickel = 5 cents

twice of dimes to nickels

let no of dimes = x and no of nickels = y

our equation

10x + 5y = 225

x = 2y

10(2y) + 5y = 225

20y +5y = 225

25 y = 225

y=9

x =2y 2x9 = 18

so the number of dimes = 18 and nickels = 9

cross verification:

10x18 + 5x9 = 180 +45 = 225  

6 0
3 years ago
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