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saveliy_v [14]
3 years ago
14

The price of an item has been reduced by 65% . The original price was $49

Mathematics
2 answers:
Simora [160]3 years ago
6 0
65%   x
100    49
                    Cross multiply And divide 100 because that's the only number
                     Left alone and 65 is your percent so you have to put it over 100 
                     X is your variable, your unknown number multiply 65 times 49 
                    divided by 100 because that's your only number ! Hope this helps
 
Basile [38]3 years ago
4 0
Hey there!

To find the discount, just multiply the original price by the percent.

49*.65= 31.85(how much it was taken off)

Now subtract31.85 from 49 and you'll get
17.15

$17.15 is now the new price
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What regression model best fits the data set?(2,13),(4,8),(5,7.5),(7,9),(8,12)
icang [17]

<u>Answer-</u>

<em>Quadratic Regression</em><em> model best fits the data set.</em>

<u>Solution-</u>

Taking x as input variable and y as output variable, regression models were obtained by using Excel.

As we can be seen that, the values of y is neither consistently increasing or decreasing ( as 13 > 8 > 7.5 < 9 < 12 ), so exponential growth  and exponential decay are of no use (because in exponential function the growth or decay rate is constant).

And also, it can not be linear, as the rate of change of y is not constant.

As we can obtain the correct regression model, by considering Co-efficient of Determination (R²). The value of R² ranges from 0 to 1. The more closer its value to 1, the better the regression model is.

From the attachment, it can be observed that,

=0.006

=R^2_{\text{Exponential}}

As the value of R² of the Quadratic Regression is more closer to 1, so that should be followed.

7 0
3 years ago
Which list shows least to greatest Look at the picture down below
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Step-by-step explanation:

8 0
3 years ago
Of the 480 students in 7th grade, 3/8 have a pet. How many 7th graders have a pet?
elena55 [62]

Answer:

<em>180</em>

Step-by-step explanation:

You need to find 3/8 of 480.

To find a fraction of a number, multiply the fraction by the number.

3/8 of 480 =

= 3/8 * 480

= 3/8 *480/1

= (3 * 480)/(8 * 1)

= 1440/8

= 180

5 0
3 years ago
How deep is the water 31.5 feet from the shore? 05<br> (10 Points)
pantera1 [17]

Answer:

This is impossible to answer, unless there is a picture that is not there.

Step-by-step explanation:

6 0
2 years ago
In ΔLMN, the measure of ∠N=90°, the measure of ∠M=70°, and NL = 74 feet. Find the length of MN to the nearest tenth of a foot.
Zina [86]

Answer:26.9 feet

Step-by-step explanation:

SOH-CAH-TOA

\tan M = \frac{\text{opposite}}{\text{adjacent}}=\frac{74}{x}

tanM=

adjacent

opposite

​

=

x

74

​

\tan 70=\frac{74}{x}

tan70=

x

74

​

x\tan 70=74

xtan70=74

Cross multiply.

\frac{x\tan 70}{\tan 70}=\frac{74}{\tan 70}

tan70

xtan70

​

=

tan70

74

​

Divide each side by tan 70.

x=\frac{74}{\tan 70}=26.9338\approx 26.9\text{ feet}

x=

tan70

74

​

=26.9338≈26.9 feet

Type into calculator and roundto the nearest tenth of a foot.

L

M

N

74

26.9

(opposite of ∠M)

(adj. to ∠M)

(hypotenuse)

70°

5 0
3 years ago
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