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asambeis [7]
3 years ago
5

Please help me with i ii iii Step by step

Mathematics
2 answers:
viva [34]3 years ago
8 0
.3 (15x+9)/3
(15x/3)+(9/3)
5x+(9/3)
5x+3
1. 4(3x+2y)-5(3x+4y)
12x+8y-5(3x+4y)
12x+8y-15x-20y
-3x+8y-20y
-3x-12y
-3(x+4y)
2. 3k+3m-2-6k-3m-2n
-3k+3m-2-3m-2n
-3k-2n-2
UkoKoshka [18]3 years ago
7 0

(i) I used distributive property to get the x’s and y’s out of parentheses. I then combined like-terms to simplify until I could do no more. That is your final answer for (i) is -3x - 12y

(ii) This one is similar to the first one, just with no parentheses. I combined like terms again until not like terms were left. Your final answer for (ii) is -3k -2 -2n

(iii) I started by dividing 15 by 3 and got 5, and because the 15 had an x to it, you get 5x. I then moved onto the next term, 9. 9 divided by 3, to get 3. Your final answer for (iii) is 5x + 3

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A woman standing on a hill sees a flagpole that she knows is 40 ft tall. the angle of depression to the bottom of the pole is 14
NemiM [27]
Let distance form the pole = x  and height of the hill = y ft

now we can set up 2 equayions 
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from second equation y = sxtan14  so we have:-
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x tan 18 = 40 - x tan 14
x(tan 18 + tan 14) = 40

x   = 40 / (tan18 + tan 14)  =  69.66 feet Answer



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lys-0071 [83]
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Step-by-step explanation:

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