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anyanavicka [17]

2 years ago

11

After three years, Elsie’s car had lost 1/3 of its original value. Two years later, it had lost an additional 1/4 of its origina

l value. If she bought the car for 3,600 dollars, what was the price it was worth after 5 years?

1 answer:

horrorfan [7]2 years ago

8 0

Answer:

1,500 dollars

Step-by-step explanation:

3,600 - 1/3(3600)=2,400

2,400 -1/4(3600)=$1,500

Hope this helps!

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According to a 2014 research study of national student engagement in the U.S., the average college student spends 17 hours per w

Nadusha1986 [10]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 17

For the alternative hypothesis,

µ < 17

This is a left tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 80,

Degrees of freedom, df = n - 1 = 80 - 1 = 79

t = (x - µ)/(s/√n)

Where

x = sample mean = 15.6

µ = population mean = 17

s = samples standard deviation = 4.5

t = (15.6 - 17)/(4.5/√80) = - 2.78

We would determine the p value using the t test calculator. It becomes

p = 0.0034

Since alpha, 0.05 > than the p value, 0.0043, then we would reject the null hypothesis.

The data supports the professor’s claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week.

4 0

3 years ago

in a triangle TRY measure angle R is 3 times measure angle T and measure angle Y is 15 more than measure angle T find the measur

r-ruslan [8.4K]

Answer:

Angle R is 99 degree

Angle Y=48 degrees

Angle T is 33 degrees

Step-by-step explanation:

Let angle T be x

Angle R will be 3x

Angle Y will be x+15

Total=x+3x+x+15=5x+15

5x+15=180

5x=165

x=165/5=33

Therefore, angle T is 33 degrees, angle Y=15+33=48 degrees and angle R=33*3=99 degrees

5 0

2 years ago

A teacher has 3 hours to grade all the papers submitted by the 35 students in her class. She gets through the first 5 papers in

Andreyy89

So, she has 3hrs to grade all papers, for 35 students.. alrite.

the first 5, she does them in 30minutes.. what's the speed rate? well, 5/30 or 1/6

now, she has still 2 hours and a half, or 150 minutes, to do the remaining 30 papers... she has to work at a rate of 30/150 then... which is 1/5 simplified.

now if we take 1/6 as the 100%, what is 1/5 in percentage then?

$\bf \begin{array}{ccllll}
rate&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{1}{6}&100\\\\
\frac{1}{5}&x
\end{array}\implies \cfrac{\frac{1}{6}}{\frac{1}{5}}=\cfrac{100}{x}\implies \cfrac{1}{6}\cdot \cfrac{5}{1}=\cfrac{100}{x}\implies \cfrac{5}{6}=\cfrac{100}{x}
\\\\\\
x=\cfrac{6\cdot 100}{5}\implies x=120$

so 1/5 is 120% in relation to 1/6... meaning the rate of 1/5 she needs to move through, namely 1 paper every 5 minutes, is 20% faster than 1/6.

8 0

3 years ago

Read 2 more answers

Choose the graph that represents the equation y=x-2

amid [387]

Step-by-step explanation:

The choices are not given but the graph looks like the above picture.

8 0

2 years ago

Read 2 more answers

Divide and simplify. √36 x⁴ / √9 x⁶

Vikki [24]

The divide and simplify of the equation √36 x⁴ / √9 x⁶ will result to $\frac{2}{x^{2} }$

Let's begin by simplifying the equation;

Simplify the equation by finding the square root of both 36 and 9

The square root of 36= 6

The square root of 9= 3

= $\frac{6x^{4} }{3x^{6} }$

The above equation can also be written as;

= $6x^{4} * 3x^{-6}$

The next step is to solve the powers, that is,

= $\frac{6x^{4} }{3x^{6} }$

Cancel out 6 by 3 and get 2

The result is,

= $\frac{2}{x^{6-4} }$

The final submission result is,

= $\frac{2}{x^{2} }$

To find more on divide and simplify, go to: brainly.com/question/16356152

#SPJ4

7 0

1 year ago