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scoray [572]
3 years ago
10

I attached the picture please help!

Mathematics
1 answer:
zzz [600]3 years ago
7 0

Answer:

29 Minutes

Step-by-step explanation:

To Solve The First Step of The Equation, You Need To Solve For 25x20/100.

Your answer will be five. To simplify, think 25 percent of 100. 25 can go into 100 four times, therefore 5 can go into 20 four times. Marcus Spent 5 minutes on soccer the first day.

For the second part, use the same equation. 40x60/100. You should get 24, so Marcus practiced 24 minutes the next day.

Add the two together, and you should get 29.

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A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at th
OlgaM077 [116]

Answer:

Interval [16.34 , 21.43]

Step-by-step explanation:

First step. <u>Calculate the mean</u>

\bar X=\frac{(23+18+23+12+13+23)}{6}=18.666

Second step. <u>Calculate the standard deviation</u>

\sigma =\sqrt{\frac{(23-18.666)^2+(18-18.666)^2+(23-18.666)^2+(12-18.666)^2+(13-18.666)^2+(23-18.666)^2}{6}}

\sigma=\sqrt\frac{18.783+0.443+18.783+44.435+5.666+18.783}{6}

\sigma=\sqrt{17.815}=4.22

As the number of data is less than 30, we must use the t-table to find the interval of confidence.

We have 6 observations, our level of confidence DF is then 6-1=5 and we want our area A to be 80% (0.08).  

We must then choose t = 1.476 (see attachment)

Now, we use the formula that gives us the end points of the required interval

\bar X \pm t\frac{\sigma}{\sqrt n}

where n is the number of observations.

The extremes of the interval are then, rounded to the nearest hundreth, 16.34 and 21.43

6 0
3 years ago
25 POINTS PLZ HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Andrews [41]

Answer:

87+87+81+86+89+83+89= 602. Divided by 7 because that’s how many numbers there were is 86 and that is your mean/average.

7 0
3 years ago
Create three new exponential equations to represent Alison, Cindy, and Javier. Alison loves social media and likes for her posts
k0ka [10]

The new exponential equations to represent Alison, Cindy, and Javier would be 1/(1+e^-x) representing an s curve showing a lot of growth.

<h3>What is an exponential equation?</h3>

The exponential function is a mathematical function denoted by f(x)=\exp or e^{x}.

Here, he new exponential equations to represent Alison, Cindy, and Javier would be 1/(1+e^-x) representing an s curve showing a lot of growth while Cindy and Javier would be ln(x) and x^(1/2) as they will grow somewhat fast at first and then die out.

Learn more about equations on:

brainly.com/question/2972832

#SPJ1

6 0
2 years ago
Pls help i need this done as quick as possible
Anvisha [2.4K]

Answer:

Infinite Solutions.

Step-by-step explanation:

m+7=3+m+4

Subtract m from both sides:

m+7-m=3+m+4-m

7=3+4

7=7

Both sides are equal.

This means that the value of m does not affect the end result of 7 = 7, which is true. Thus, there are infinite solutions as any value of m will still make the equation true.

4 0
3 years ago
Fourteen school festival tickets were sold to adults and children. A total of $38 was collected from these ticket sales. Adult t
spayn [35]

Answer:

A

Step-by-step explanation:

8 0
3 years ago
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