Si it is a linear eqaution
The relationship between variance and standard deviation is :
Standard deviation = sqrt (variance),
Variance = standard deviation^2.
hope this help
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Step-by-step explanation:
6. The fraction can be written as;

Divide 4 by 2
=
7.
The fraction can be written as;

introduce product sign as

8.
The fraction can be written as;

Introduce product sign

9.
The fraction can be written as;

10.
The fraction is simplified to;

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Simplifying complex fractions:brainly.com/question/12214941
Keywords: simplifying, complex, fractions
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Answer:
t≅13.33h
Step-by-step explanation:
Adam (A) works at constant rate of 50tiles/h
Briana (B) works at constant rate of 55tiles/h, this means that A=50 tiles per hour and B=55 tiles per hour, then A+B = 105tiles/h together, but the floor consists of 1400tiles, so if 105 tiles are installed in one hour, then 1400 tiles in how long they will be installed?
t = 1400tiles*h/105tiles≅ 13.33 h