Which expression is irrational? 8 over 5. square root of 4 square root of 10. square root of 64

Mathematics

2 answers:

VLD [36.1K]4 years ago

6 0

Answer:

10 squared

Step-by-step explanation:

i got it right on my test and i hope this helps

postnew [5]4 years ago

4 0

$\frac{8}{5} = 1.6$ is rational

$\sqrt{4} = 2$ is rational

$\sqrt{10} \approx 3.162277660168$ is irrational

$\sqrt{64} = 8$ is rational

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Patricia produces wall calendars which she sells at the weekend. Each calendar requires 12 sheets of paper and a cover. The pape

Tems11 [23]

Answer:

Patricia sell each calendar for $7.68

Step-by-step explanation:

Each calendar requires 12 sheets of paper and a cover.

Cost of 200 sheets = $50

Cost pf 12 sheets = $\frac{50}{200} \times 12=3$

Cost of 100 covers = $40

Cost of 1 cover = $\frac{40}{100}=0.4$

Patricia estimates that the other costs for producing 1 calendar come to $3.

So, total cost for 1 calendar = $3+$0.4+$3=$6.4

She sells the calendars for 20% more than the amount that it costs her to produce them.

So, Selling price of 1 calendar = $6.4+20\%(6.4)=6.4+0.2(6.4)=7.68$

Hence Patricia sell each calendar for $7.68

3 0

4 years ago

What is the solution set for the equation 2|-3n| + 10 = 50<br><br> I

Aleks04 [339]

Answer:

$n=-\frac{20}{3}\quad \mathrm{or}\quad \:n=\frac{20}{3}$

Step-by-step explanation:

$2\left|-3n\right|+10=50\\\\\mathrm{Subtract\:}10\mathrm{\:from\:both\:sides}\\\\2\left|-3n\right|+10-10=50-10\\\\Simplify\\\\2\left|-3n\right|=40\\\\\mathrm{Divide\:both\:sides\:by\:}2\\\\\frac{2\left|-3n\right|}{2}=\frac{40}{2}\\\\Simplify\\\\\left|-3n\right|=20\\\\\mathrm{Apply\:absolute\:rule}:\\\quad \mathrm{If}\:|u|\:=\:a,\:a>0\:\mathrm{then}\:u\:=\:a\:\quad \mathrm{or}\quad \:u\:=\:-a\\$

$-3n=-20\quad \mathrm{or}\quad \:-3n=20\\\\-3n=-20\quad :\quad n=\frac{20}{3}\\\\-3n=20\quad :\quad n=-\frac{20}{3}\\\\n=-\frac{20}{3}\quad \mathrm{or}\quad \:n=\frac{20}{3}$