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Lostsunrise [7]
2 years ago
15

This is due tomorrow, help!​

Mathematics
1 answer:
skelet666 [1.2K]2 years ago
4 0

Deena said that she received a 25 dollar discount but the equation says 9x + 25 = 28.

The Rewrite would be: 9x - 25 = 28.

How to make the situation fit the equation?:  "I bought some shirts at the store for $9 each and received a $25 add on. My total bill was $88. How many shirts did I buy?"

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A book has 500 pages numbered 1,2,3 and so on. How many times does the digit 1 appear in the page numbers?
elena-14-01-66 [18.8K]

Answer:

200

Step-by-step explanation:

This book has 500 pages in total.

We should split up the place values.

1 - 9

One only appears once.

1

10 - 19

One appears 11 times.

1 + 11

20 - 99

One only appears 8 times.

1 + 11 + 8

Add:

1 + 11 + 8

=> 20

Since the same is for  200-299, and so on. Let us add twenty four times.

20 * 4

=> 80

Looking back to 100-199, there are 120 ones.

Add:

120 + 80

=> 200

4 0
3 years ago
Thirty-three college freshmen were randomly selected for an on-campus survey at their university. The participants' mean GPA was
Ivan

Answer: \pm0.1706

Step-by-step explanation:

Given : Sample size : n= 33

Critical value for significance level of \alpha:0.05 : z_{\alpha/2}= 1.96

Sample mean : \overline{x}=2.5

Standard deviation : \sigma= 0.5

We assume that this is a normal distribution.

Margin of error : E=\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

i.e. E=\pm (1.96)\dfrac{0.5}{\sqrt{33}}=\pm0.170596102837\approx\pm0.1706

Hence, the  margin of error is \pm0.1706

7 0
3 years ago
a fireplace contains 46 bricks along its bottom row. if each row above decreases by 4 bricks, what is the function that shows th
m_a_m_a [10]
\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
a_1=46\\
d=-4\\
n=12
\end{cases}
\\\\\\
a_{12}=46+(12-1)(-4)
4 0
3 years ago
Read 2 more answers
WEEEEEEEEEEEEEEEEEEEEEEE
matrenka [14]

YOU WILL NOT FAIL, YOU SHALL PASS

Answer: w^6/9

Step-by-step explanation:

first, i evaluated the powers.

3^-2 x 1 x 1/w^-6

then, i calculated those products.

3^-2/w^-6

then, i just expressed it with a positive exponent.

w^6/3^2

finally, i evaluated that.

w^6/9

4 0
3 years ago
Read 2 more answers
What is 21 divide by 21​
user100 [1]

Answer:

it is 1

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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