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3 years ago

Please help!! Thanks in advance :)

Mathematics

2 answers:

Alisiya [41]3 years ago

7 0

Answer:

180 plants

Step-by-step explanation:

the area of a right triangle is: ab/2

side a = 8

side b = 15

8 x 15 = 120

120/2 = 60

Michael wants 3 plants for every square yard (multiply by 3)

60 x 3 = 180

Oliga [24]3 years ago

3 0

Answer:

180

Step-by-step explanation:

Height times width/2 equals the area of a triangle. 8 times 15 divided by 2 equals 60. 3 plants per square yard. 3 times 60 equals 180.

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-12 +15 + (-30) +17= (?)

tino4ka555 [31]

Answer:

-10

Step-by-step explanation:

-12+15=3

(-30)+17=-13

3+(-13)=-10

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3 years ago

Cot (15 degrees)

STatiana [176]

Answer:

Part I: cot(15 degrees) = cot(45 - 30)

Part II: Evaluation is below

Step-by-step explanation:

<em>Everything is done in degrees</em>

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Two angles that differ by 15 degrees that is easy to evaluate is 30 degrees and 45 degrees. The cot(15 degrees) = cot(45 - 30) = 1/tan(45-30) = (1+tan45tan30)/(tan30 - tan45) = (1+ sqrt(3))/(sqrt(3) - 1)

We rationalize this by multiplying 1+ sqrt(3) in the top and bottom, getting:

(4 + 2sqrt(3))/2 = 2 + sqrt(3)

I hope this helps! :)

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3 years ago

How does the volume of an oblique cone change if the height is reduced to 2/3 of its original size and the radius is doubled

spayn [35]

The volume of oblique cone = $\frac{1}{3} \pi r^{2} h$

Now radius is doubled is now it is 2r

And height is reduced to 2/3 of its original size that is 2/3 h

So plugging the values we get volume

New Volume = $\frac{1}{3} \pi (2r)^2 (\frac{2}{3} h)$

= $\frac{1}{3} \pi 4r^2 (\frac{2}{3} h) = \frac{8}{6} \pi r^{2} h =\frac{8}{2} (\frac{1}{3} \pi r^{2} h )$ $=4*(\frac{1}{3} \pi r^{2} h )$

It means the volume becomes 4 times

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4 years ago

What is the distance of -a and a?

melamori03 [73]

Step-by-step explanation:

Distance = positive value

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Please help!! :(((((((

masha68 [24]

The answers would be 11, if you plug it in it would be 5(11)-7=48

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