3 years ago

The Grade 8 students held a graduation dance.

Mathematics

2 answers:

nataly862011 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

4/7

16x7= 112

4x16=64

ra1l [238]3 years ago

5 0

64 as in 69 if you know what i mean

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52 + 3x = 5(−x + 9) − 49 solve for x

Tems11 [23]

Answer:

x = -7

Step-by-step explanation:

52 + 3x = -5x + 45 - 49

8x = -56

x = -7

3 0

3 years ago

A business knew that 30%, percent of its customers were less than 25 years old. The business wanted to increase this percentage,

jeyben [28]

Answer:

The answer is "0.9258201 or $\bold{ \frac{0.36 -0.3}{\sqrt{\frac{0.3 \times 0.7 }{50}}}}$ ".

Step-by-step explanation:

$\to P= 30 \ \%\\\\ \to x= 18 \\\\ \to n=50\\\\\\\hat p= \frac{x}{n} = \frac{18}{50} = 0.36 \\\\\bold{Formula:}\\\\X= \frac{\hat p -p}{\sqrt{\frac{p \times (1-p)}{n}}}\\\\$

$= \frac{0.36 -0.3}{\sqrt{\frac{0.3 \times (1-0.3)}{50}}}\\\\= \frac{0.36 -0.3}{\sqrt{\frac{0.3 \times 0.7 }{50}}}\\\\= \frac{0.36 -0.3}{\sqrt{\frac{0.21}{50}}}\\\\= \frac{0.06}{\sqrt{0.0042}}\\\\= \frac{0.06}{0.064807407}\\\\= 0.9258201$