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RSB [31]
4 years ago
7

HELPP PPLEASEEE!!!

Mathematics
2 answers:
olga2289 [7]4 years ago
5 0

Answer:

See below in bold.

Step-by-step explanation:

Ship's vector:

Horizontal component = 30 cos 30  = 25.98.

Vertical component = 30 sin(-30) = -15.

So it is <25.98, -15).

The current's vector:

Horizontal component =  5 sin 20 = 1.71.

Vertical component = 5 cos 20 = 4.7.

So it is <1.71, 4.7>.

astraxan [27]4 years ago
3 0

Answer:

Step-by-step explanation:

Resultant R of the two vectors is

R^2=a^2+b^2+2abcos\theta

R^2=30^2+5^2+2\left ( 30\right )\left ( 5\right )cos\theta

Where \thetais the angle between Two vectors which is 100^{\circ}[/tex]

R^2=900+25+2\times 30\times 5\times cos100

R^2=925-52.094

R=29.544 miles per hour

and it makes an angle \phiwith 30 miles/hr vector

tan\phi =\frac{5}{30}

\phi =tan^{-1}\frac{1}{6}

\phi =9.462^{\circ}

i.e.it makes an angle of 20.538 South of east with horizontal

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The height of five soldiers included 60inches,67inches,65inches and 64inches,if the mean of the five soldiers is 65inches what i
Nadya [2.5K]

Answer:

The last guy's height is 69 inches

Step-by-step explanation:

mean=sum of all numbers/number of numbers

There are 5 numbers in the set which means that 65 is the sum of all five numbers divided by 5. To reverse that we multiply 65 by 5 to get the sum of all of the numbers.

65*5=325

325 is the sum of all of the numbers so to find the missing number you add up all of the known numbers in the set and find the difference between that sum and 325.

60+67+65+64=256

325-256=69

The missing guy's height is 69 inches.

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3 years ago
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Step-by-step explanation:

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Help please, asap, And take your time answering please!
ankoles [38]

Answer:

  (a) 25

  (b) (5+4)*2 +6 -2*2 -1

  (c) see below

Step-by-step explanation:

(a) evaluating exponents:

  6*7 -9*9 +64

Evaluating products:

  42 -81 +64

Evaluating sums:

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__

(b) The last three terms of the expression sum to +1, and it is fairly easy to modify the first two terms to make one term that has a value of 18. Then the expression evaluates as 18+1 = 19.

  (5+4)*2 +6 -2*2 -1

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