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enyata [817]
2 years ago
14

Fatima found a $129 prom dress at the department store. She also had to pay a 6.5% sales tax. What was the total cost of the pro

m dress?
Mathematics
1 answer:
Mama L [17]2 years ago
6 0

Answer

137.385

Step-by-step explanation:

What is 6.5% of 129?

First, you have to change 6.5% to a decimal which is 0.065.

Then, you have to multiply 0.065 times 129 which gives you 8.385.

Finally, you have to add that amount to 129 which gives you $137.385, and that is the total cost of the prom dress

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4 0
3 years ago
P(x) = 3x2 - 7x + 11, find P(9).
nadya68 [22]
You need to substitute 9 with every x value in the equation. 
So, 3(9)^2-7(9)+11
p(x)= 191
6 0
3 years ago
Read 2 more answers
Scores on an exam follow an approximately bell shaped distribution with a mean of 76.4 and a standard deviation of 6.1 points. A
Crazy boy [7]

Answer:

b) 95%

Step-by-step explanation:

We have been given that scores on an approximately bell shaped distribution with a mean of 76.4 and a standard deviation of 6.1 points. We are asked to find the percentage of the data that is between 64.2 points and 88.6 points.

First of all, we will find z-scores of each data point as:

z=\frac{x-\mu}{\sigma}

z=\frac{64.2-76.4}{6.1}

z=\frac{-12.2}{6.1}

z=-2

Let us find z-score corresponding to normal score 88.6.

z=\frac{88.6-76.4}{6.1}

z=\frac{12.2}{6.1}

z=2

To find the percentage of the data is between 64.2 points and 88.6 points, we need to find area under a normal distribution curve that lie within two standard deviation of mean.

The empirical rule of normal distribution states that approximately 95% of data points fall within two standard deviation of mean, therefore, option 'b' is the correct choice.

6 0
3 years ago
PLEASE HELP ARGENt!!!!!!!!!!!!
jekas [21]

Answer:

1.060

Step-by-step explanation:

I added 1 tenth to the answer.I'm sorry if the answer if wrong. math isnt my best just trying to help

6 0
3 years ago
Mark's age, x, is 6 times his age 2 years ago.
Inessa [10]
A. x=6x+2
yup if that's wrong go to scoratic and take a picture of the question then it tells you what it actually is
5 0
3 years ago
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