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2 years ago

6. There are 450 students in the school. 60% are 6th graders. How mar

Mathematics

1 answer:

Rudiy272 years ago

3 0

Answer:

180

Step-by-step explanation:

40% are not 6th graders

10% of 450 if 45

there are four 10 percents in 40%, so 45 x 4 = 180

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Do the ratios 1/2 and 6/12 form a proportion

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Answer:

Step-by-step explanation:

Yes because 6 is 1/2 of 12

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2 years ago

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Simplify using the order of operations.<br> 3/8-1/9

svetoff [14.1K]

Answer:

19 /72 ≈0.264

Step-by-step explanation:

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2 years ago

A number between 55 and 101 that is a multiple of 2, 8, and 16

ch4aika [34]

Ànswer is 64 , 80, and 96

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2 years ago

Three tanks have a total capacity of 266 gallons. If two tanks are the same size and the

mojhsa [17]

Answer:

53.2 gallons

Step-by-step explanation:

let 't' = tank

t + t + t/2 = 266

5/2t = 266

multiply each side by 2/5 to get:

t = 106.4

the two larger tanks can each hold 106.4 gallons

the smaller tank can hold 53.2 gallons

7 0

1 year ago

Can anyone figure this out?

Verizon [17]

$\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ N(\stackrel{x_1}{-3}~,~\stackrel{y_1}{10})\qquad A(\stackrel{x_2}{6}~,~\stackrel{y_2}{3})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ NA=\sqrt{(6+3)^2+(3-10)^2}\implies NA=\sqrt{130} \\\\[-0.35em] ~\dotfill\\\\ A(\stackrel{x_2}{6}~,~\stackrel{y_2}{3})\qquad D(\stackrel{x_1}{6}~,~\stackrel{y_1}{-1}) \\\\\\ AD=\sqrt{(6-6)^2+(-1-3)^2}\implies AD=4 \\\\[-0.35em] ~\dotfill$

$\bf D(\stackrel{x_1}{6}~,~\stackrel{y_1}{-1})\qquad N(\stackrel{x_1}{-3}~,~\stackrel{y_1}{10}) \\\\\\ DN=\sqrt{(-3-6)^2+(10+1)^2}\implies DN=\sqrt{202}$

now that we know how long each one is, let's plug those in Heron's Area formula.

$\bf \qquad \textit{Heron's area formula} \\\\ A=\sqrt{s(s-a)(s-b)(s-c)}\qquad \begin{cases} s=\frac{a+b+c}{2}\\[-0.5em] \hrulefill\\ a=\sqrt{130}\\ b=4\\ c=\sqrt{202}\\[1em] s=\frac{\sqrt{130}+4+\sqrt{202}}{2}\\[1em] s\approx 14.81 \end{cases} \\\\\\ A=\sqrt{14.81(14.81-\sqrt{130})(14.81-4)(14.81-\sqrt{202})} \\\\\\ A=\sqrt{324}\implies A=18$

5 0

2 years ago