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3 years ago

PLEASE HELP WILL GIVE THANKS, 5 STAR RATING, AND BRAINLIEST!!!!

Mathematics

1 answer:

FromTheMoon [43]3 years ago

6 0

So these are trig questions so for question 1 you have the opposite side and you are trying to find the adjacent side so you use tan = o/a . So therefore tan(67) = 17/a so 17/tan(67) is a so a is 7.216 which is 7.2 to the nearest tenth.

For question 2 you have the adjacent side and are trying to find the opposite side so you do tan(24) is x/12 so tan(24) x 12 is x so x is 5.34 or 5.3 to the nearest tenth.

Question three you have the adjacent and are trying to find the opposite so you do tan(72) = x/20 so you do tan(72) x 20 to get 61.55 or 61.6 to the nearest tenth.
Hope this helps :)

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Diane runs 10 miles in 55 minutes, how many minuets does she take per mile?

Brut [27]

Step-by-step explanation:

Hi!!

 It's simple, you can do it easily. 

no. of miles = 10 miles

time = 55 mins.

now,

no. of mins for 1 mile = no. of miles/ time

 = 10 /55

 =0.18181818 min.

so, she takes 0.181818 or 2/11 min per each mile.

Hope it helps...

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3 years ago

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Please help.

Archy [21]

Answer:

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Step-by-step explanation:

When a circle's radius is 1—called a unit circle—its circumference is 2π.

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2 years ago

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What are the real and complex solutions of the polynomial equation? x^3-8=0. with imaginary numbers

seraphim [82]

Answer:

Solutions are 2, -1 + 0.5 sqrt10 i and -1 - 0.5 sqrt10 i

or 2, -1 + 1.58 i and -1 - 1.58i

(where the last 2 are equal to nearest hundredth).

Step-by-step explanation:

The real solution is x = 2:-

x^3 - 8 = 0

x^3 = 8

x = cube root of 8 = 2

Note that a cubic equation must have a total of 3 roots ( real and complex in this case). We can find the 2 complex roots by using the following identity:-

a^3 - b^3 = (a - b)(a^2 + ab + b^2).

Here a = x and b = 2 so we have

(x - 2)(x^2 + 2x + 4) = 0

To find the complex roots we solve x^2 + 2x + 4 = 0:-

Using the quadratic formula x = [-2 +/- sqrt(2^2 - 4*1*4)] / 2

= -1 +/- (sqrt( -10)) / 2

= -1 + 0.5 sqrt10 i and -1 - 0.5 sqrt10 i

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2 years ago

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LONG WORD PROBLEM I KNOW! PLEASE ILL GIVE THANKS BRAINLIEST AND POINTS FOR THIS ANSWER! PLEASE!

11Alexandr11 [23.1K]

Answer:
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Step-by-step explanation:
let t = work hours
0 < t < 30
X = time lawn mowing
Y = time babysitting.
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We could solve...
X < 30 - Y
5(30 - Y) + 8Y >=300
150 - 5Y + 8Y >= 300
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Y >=50
then X < -20
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3 years ago

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