2 years ago

9.

Mathematics

1 answer:

Rainbow [258]2 years ago

3 0

B=195+15x is the answer eekeirrnrnejr

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Multiply the trinomial x^2+xy+y^2 times the binomial x-y and simplify.

Natalija [7]

Multiply then simplify, that's doing the same work twice...anyway

x^3+x^2y+xy^2-x^2y-xy^2-y^3

x^3-y^3 which if factored is:

(x-y)(x^2+xy+y^2) which is what you started with :)

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3 years ago

The length of a rectangle is twice the width. the perimeter is 32 cm more than the width. find the dimensions of the rectangle.

SCORPION-xisa [38]

Width: x
Length: 2x
Perimeter=2x+2x+x+x=6x
32 cm more than width means x+32
6x=x+32
5x=32
x=6.4
Dimension is 6.4×12.8 (width×length)

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3 years ago

How I can answer this question, NO LINKS, if you answer correctly I will give u brainliest!

allochka39001 [22]

Answer:

I think b) is the answer I solve it but

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2 years ago

Do I solve this by equaling both equations to each other?

Mars2501 [29]

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3 years ago

Prove the trig identity: (tanx/1+secx)+(1+secx/tanx)=2cscx

lakkis [162]

=[(sinx/cosx)/(1+1/cosx)] + [(1+1/cosx)/(sinx/cosx)]

=[(sinx/cosx)/(cosx+1/cosx)]+[(cosx+1/cosx)/(sinx/cosx)]

= [sinx/(cosx+1)] + [(cosx+1)/sinx]

= [sin^2x+(cosx+1)^2] / [sinx (cosx+1)]

= [2+2cosx] / [sinx(cosx+1)]

=[2(cosx+1)] / [sinx (cosx+1)]

= 2/sinx

= 2 cscx

(I think this will be helpful for you. if you can see the picture, it has more detail in it.)

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3 years ago