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strojnjashka [21]
3 years ago
6

What single percentage change is equivalent to a 11% decrease followed by a 21% increase?

Mathematics
1 answer:
ollegr [7]3 years ago
7 0

Answer:

7.69% increase

Step-by-step explanation:

Let our initial number be 100

11% decrease will be;

100- 0.11(100) = 100-11 = 89

A 21% increase will be;

89 + 21% of 89

89 + 0.21(89)

= 107.69

difference from the starting is 107.69 - 100 = 7.69

The percentage is 7.69% increase

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Sladkaya [172]

Answer:

4. 16.5 minutes 2508 words - Robert

5. 60 words (c)

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Step-by-step explanation:

4. 304 ÷ 2 = 1 minute 152 words - Robert

2508 ÷ 152 = 16.5 minutes 2508 words - Robert

5. 152 × 20 = 3040 words - Robert

483 ÷ 3 = 1 minute 161 words - Michaela

161 × 20 = 3220 words - Michaela

316 ÷ 2 = 1 minute 158 words - Laura

158 × 20 = 3160 words - Laura

= 3220 - 3160

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2 years ago
Arionna needed to graph triangle PQR reflected across the y-axis which statement identify her errors
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bija089 [108]

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Step-by-step explanation:

7 0
3 years ago
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Find the range for f(x) = x2 + 1, for x &lt; 0. <br> y ≥ 1<br> y &gt; 1<br> y &lt; 1<br> y ≤ 1
mamaluj [8]
Here, you have to determine values of f(x) for negative domain. Domain are those values of x for which function is defined.
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4 years ago
1/(x-2)+1/(x+3)=1/5 solve the problem for me​
Gennadij [26K]

════════ ∘◦❁◦∘ ════════

<h3>Final value : x² -9x - 11</h3>

════════════════════

<h3>Step by step </h3>

\frac{1}{(x - 2)}  +  \frac{1}{(x + 3)}  =   \frac{1}{5}

\frac{(x + 3) + (x - 2)}{(x - 2)(x + 3)}  =  \frac{1}{5}

\frac{2x + 1}{ {x}^{2} + 3x - 2x - 6 }  =  \frac{1}{5}

\frac{2x + 1}{ {x}^{2}  + x - 6}  =  \frac{1}{5}

2x + 1 = ⅕ × (x² + x - 6)

2x + 1 = ⅕x² + ⅕x - 6/5

1/5x² +1/5x - 2x - 6/5 - 1 = 0

1/5x² -9/5x - 11/5 = 0

x² - 9x - 11 = 0. #times by 5

════════════════════

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