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mr_godi [17]
3 years ago
13

X=7w^2+4w-6 Y=w^2-11w+13 X+Y=

Mathematics
2 answers:
natita [175]3 years ago
8 0

Answer:

X+Y= 8w²–7w +7

Step-by-step explanation:

X+Y= ( 7w²+4w-6 ) + (w²-11w+13)

X+Y= 8w²–7w +7

I hope I helped you^_^

Furkat [3]3 years ago
5 0
Answer:

8w^2 - 7w + 7

Step-by-step explanation:

x = 7w^2 + 4w - 6

y = w^2 - 11w + 13

x + y =

7w^2 + 4w - 6 + w^2 - 11w + 13 =

8w^2 - 7w + 7
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Find the sale price to the nearest cent.<br><br> $140 coat; 10% discount
mrs_skeptik [129]

Answer:

126

Step-by-step explanation:

140*10%

change to decimal:

140*.10

14 dollars off original price

140 - 14 = 126

5 0
3 years ago
Read 2 more answers
A university is applying classification methods in order to identify alumni who may be interested in donating money. The univers
HACTEHA [7]

The accuracy in the research done by university is 0.81, sensitivity is 0.93, specificity is 0.81 and precision is 0.047.

Given sample size of 58205 and proportion of people donated 576. Cutoff is 0.5.

Probability is the chance of happening an event among all the events possible. It lies between 0 and 1.

TP=total people donated in sample, TN=total number of people,FP=donation,FN=No donation

Accuracy is calculated as under:

=(TP+TN)/(TP+TN+FP+FN)

=(268+23439)/(238+23439+5375+20)

=23707/29102

=0.81

Accuracy=0.81

Sensitivity is calculated as under:

=TP/(TP+FN)

=268/(268+20)

=268/288

=0.93

Precision is calculated as under:

=TP/(TP+FP)

=268/(268+5375)

=268/5643

=0.047

Their values are the probabilities in itself.

Hence accuracy is 0.81, sensitivity is 0.93, specificity is 0.81 and precision is 0.047.

Learn more about probability at brainly.com/question/24756209

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7 0
2 years ago
Determine the amount needed such that when it comes time for retirement, an individual can make monthly withdraws in the amount
bazaltina [42]

Answer:

The amount needed such that when it comes time for retirement is $396721.78.

Step-by-step explanation:

Given : An individual can make monthly withdraws in the amount of $2,154 for 30 years from an account paying 5.1% compounded monthly.

To find : The amount needed such that when it comes time for retirement?

Solution :

Using the formula of monthly payment,

Monthly payment, M=\frac{\text{Amount}}{\text{Discount factor}}

Discount factor D=\frac{1-(1+i)^{-n}}{i}  

Where,

Amount = ?

Monthly payment  M=$2154

Rate r= 5.1%=0.051

i=\frac{0.05}{12}=0.00425

Time = 30 years  

n=30\times12=360

Substitute all the values,

D=\frac{1-(1+i)^{-n}}{i}

D=\frac{1-(1+0.00425)^{-360}}{0.00425}

D=\frac{1-(1.00425)^{-360}}{0.00425}

D=\frac{1-0.21723}{0.00425}  

D=\frac{0.78277}{0.00425}

D=\$184.1811

Monthly payment, M=\frac{\text{Amount}}{\text{Discount factor}}

2154=\frac{A}{184.1811}

A=2154\times 184.1811  

A=\$396721.778

Nearest cent, A=\$396721.78

Therefore, the amount needed such that when it comes time for retirement is $396721.78.

6 0
4 years ago
PLEASE HELP!!<br> what is the value of x?
andrew-mc [135]
I think it’s 26.4






step-by-step explanation
6 0
4 years ago
The shoe store has a mark up rate 75% and is selling a pair of shoes for $133 find the price the store paid for the shoes
Angelina_Jolie [31]
133/1.75 = $76 :)
.............................
7 0
4 years ago
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