How do I complete this

Mathematics

1 answer:

DochEvi [55]2 years ago

3 0

Answer:i dont know evaluate it

Step-by-step explanation:

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In a survey of 800 people, 42% said they shopped online last week. How many people said they shopped online last week?

slavikrds [6]

336

explanation:

percent. part

_______ = _____

100. whole

42. ?

____ = ____

100. 800

cross multiply

800×42=33,600

then divide by 100

33,600/100=336

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2 years ago

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What is one third of 27 over 48

Pachacha [2.7K]

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3 years ago

Find the value of x. Give your answer in simplest radical form.

yarga [219]

Using the pythagoras theorem for a right-angled triangle:-

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3 years ago

What is the simplest form of i^16 plus i^6 minus 2i^5 plus i^13?

BARSIC [14]

$\bf \textit{recall that}\qquad i^4=1\qquad i^3=-i\qquad i^2=-1\\\\
-------------------------------\\\\
i^{16}+i^6-2i^5+i^{13}\implies i^{4\cdot 4}~+~i^{4+2}~-~2i^{3+2}~+~i^{4+4+4+1}
\\\\\\
(i^4)^4~+~i^4\cdot i^2~-~2\cdot i^3\cdot i^2~+~i^4\cdot i^4\cdot i^4\cdot i^1
\\\\\\
(1)^4+[1\cdot -1]-[2(-i)(-1)]+[(1)(1)(1)(i)]
\\\\\\
1-1-2i+i\implies -i$