3 years ago

Pleaseee help me like I need hp

Mathematics

2 answers:

aksik [14]3 years ago

8 0

Answer:

Please mark me as brainlist and the answer is above by pic

LenaWriter [7]3 years ago

4 0

Its 14 (20 chars limit thing)

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Rectangle a has area 40 cm square and length 8 cm. the area of rectangle b is one half the area of rectangle

lesya [120]

Area of rectangle b=1/2 area of rectangle a=40/2=20 cm²
Length=8 cm
Width of rectangle b=20/8 =2.5 cm

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3 years ago

What is the value of the expression 10(6 + 5)² when b = 3?

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For this question, I'm having trouble taking the inverse. Does the derivative need to be taken before the inverse is?

bogdanovich [222]

It's asking on the slope of it for the f⁻¹(x), so you have to get the inverse firstly, then we can simply get the derivative by implicit differentiation,

$\bf f(x)=4x^5-\cfrac{1}{x^4}\qquad \stackrel{inverse}{x=4y^5-\cfrac{1}{y^4}}\implies x=4y^5-y^{-4}
\\\\\\
\stackrel{\textit{implicit differentiation}}{1=4\left(5y^4\frac{dy}{dx} \right)-\left(-4y^{-5}\frac{dy}{dx} \right)}\implies 1=20y^4\cfrac{dy}{dx}+4y^{-5}\cfrac{dy}{dx}
\\\\\\
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3 years ago