Mathematics: Can someone explain how to do these

Can someone explain how to do these

Ответ:

yoopp

13.01.2022

Mathematics

do you want me to further factorise them??

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Ответ:

hectorgonzalejr333

13.01.2022

Mathematics

see explanation

Step-by-step explanation:

(3)

Multiply numerator/denominator of fraction by $\sqrt{3}$

2 $\sqrt{3}$ + $\frac{3}{\sqrt{3} }$ × $\frac{\sqrt{3} }{\sqrt{3} }$

= 2 $\sqrt{3}$ + $\frac{3\sqrt{3} }{3}$

= 2 $\sqrt{3}$ + $\sqrt{3}$ = 3 $\sqrt{3}$

(6)

Multiply numerator/denominator of fraction by $\sqrt{7}$

$\frac{28}{\sqrt{7} }$ × $\frac{\sqrt{7} }{\sqrt{7} }$ - 3 $\sqrt{7}$

= $\frac{28\sqrt{7} }{7}$ - 3 $\sqrt{7}$

= 4 $\sqrt{7}$ - 3 $\sqrt{7}$ = $\sqrt{7}$

(9)

Multiply numerator/denominator of fraction by $\sqrt{7}$

$\frac{49}{\sqrt{7} }$ × $\frac{\sqrt{7} }{\sqrt{7} }$ - 3 $\sqrt{7}$

= $\frac{49\sqrt{7} }{7}$ - 3 $\sqrt{7}$

= 7 $\sqrt{7}$ - 3 $\sqrt{7}$ = 4 $\sqrt{7}$

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Ответ:

Aubreigh29

05.12.2021

Mathematics

If f(x)represents the height, then the rate of change of f(x) would be the change in height over time. Therefore, the average rate of change would represent the change in height of the water between f(4) and f(1)

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Can someone explain how to do these

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