2 years ago

Is there any app which helps solve pure maths questions?

Mathematics

1 answer:

allochka39001 [22]2 years ago

4 0

Answer:

math a app good luck with the question

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Multiply row 2 by the reciprocal of −40:

olga_2 [115]

Answer:

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Step-by-step explanation:

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2 years ago

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Write an inequality for the given statement:the sum of x and 25 is less than 75

tiny-mole [99]

Answer:

$x + 25 < 75$ ; $x < 50$

Step-by-step explanation:

The inequality says the sum of x and 25 (written as x + 25) is less than (<) 75.

The inequality is written as: $x + 25 < 75$

My work for solving the inequality is in the picture.

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2 years ago

Work out the total surface area of this hemisphere which has a radius of 8cm.

Masja [62]

$\bf \textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} r=8 \end{cases}\implies SA=4\pi (8)^2\implies SA=256\pi \\\\\\ \stackrel{\textit{half of that for a \underline{hemi}sphere}}{\cfrac{256\pi }{2}\implies 128\pi \implies }\stackrel{\textit{rounded up}}{402.1}$