Idk how to do this what’s the answers plz

Mathematics

2 answers:

Vika [28.1K]3 years ago

6 0

Walk is a 90 degree angle because of the angle marker

Bus is given

360-90 gives the total for bike,bus,car
=270-120= 150 (120 is from the given)

150 is what is left for bike and car
I say your best is to divide that by 2 but you don’t know the exact degree but those two seem pretty well even so 150/2= 75 aka 75 for both bike and car

Now that you know the degrees you have to find the percents. 360=1 circle

Walk=90/360=.25•100=25%

Bus=120/360=.33•100=33%

Bike=75/360=.208•100=21% (rounded)

Car is the same as bike=21%

Add up percents and it should add up to 100 to check.

Now back to the decimals. Sorry for the inconvenience.

Use .25•(total number of pupils)=9 pupils that walked.

Do that for each one and at the end all your answers for the boxes should add up to 36

jonny [76]3 years ago

5 0

Answer:

Walk= 9

Bus= 12

Car= 8

Bike= 7

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What is the quadrants of a graph

lesya692 [45]

Answer:

The quandrants on a grap are basically the groups on the graph like quadrant I ,II ,III , and IV hope that helps

Step-by-step explanation:

7 0

3 years ago

-3(n+9)=15 i need the step of solving this plzz brainliest if right!!

raketka [301]

Answer:

n = -14

Step-by-step explanation:

-3(n+9)=15

Distribute -3 to (n+9):

-3n - 27 = 15

Add 27 to both sides:

-3n = 42

Divide both sides by -3:

n = -14

5 0

2 years ago

(I've been trying to figure this out for 3 days and I really need help)

liq [111]

Check the picture below.

since the diameter of the cone is 6", then its radius is half that or 3", so getting the volume of only the cone, not the top.

$\bf \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=3\\ h=4 \end{cases}\implies V=\cfrac{\pi (3)^2(4)}{3}\implies V=12\pi \implies V\approx 37.7$

now, the top of it, as you notice in the picture, is a semicircle, whose radius is the same as the cone's, 3.

$\bf \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=3 \end{cases}\implies V=\cfrac{4\pi (3)^3}{3}\implies V=36\pi \\\\\\ \stackrel{\textit{half of that for a semisphere}}{V=18\pi }\implies V\approx 56.55$

well, you'll be serving the cone and top combined, 12π + 18π = 30π or about 94.25 in³.

pretty much the same thing, we get the volume of the cone and its top, add them up.

$\bf \stackrel{\textit{cone's volume}}{\cfrac{\pi (3)^2(8)}{3}}~~~~+~~~~\stackrel{\stackrel{\textit{half a sphere}}{\textit{top's volume}}}{\cfrac{4\pi 3^3}{3}\div 2}\implies 24\pi +18\pi \implies 42\pi ~~\approx~~131.95~in^$