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o-na [289]
3 years ago
14

3(2b+4)=6(5b+2)please step by step

Mathematics
1 answer:
Lena [83]3 years ago
3 0
A b=0    Subtract 12 from both sides 6b+12-12=30b+12-12

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(X+4)^2 solve the binomial
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Please help with algebra, 50 points to anyone who can answer!!
aev [14]

Answer:

let's solve them.

Step-by-step explanation:

1) go...

To find that

" After how many days is the revenue for each game the same "

we have to balance the two equations :

m(x) = r(x) \\  {x}^{2} - 9x - 10 = 2x + 10 \\

subtract the sides of equation minus 10

{x}^{2} - 9x - 20 = 2x

subtract the sides of equation minus 2x

{x}^{2} - 11x - 20 = 0

now we have to find ∆ to can find the value of x

∆ =  {b}^{2} - 4ac \\ a = 1 \\ b =  - 11 \\ c =  - 20 \\ \\   ∆ =  {11}^{2} - 4(1)( - 20) \\  \\  ∆ = 121 + 80 = 201

To find the value of x we have this equation :

x = \frac{ - b +  \sqrt{∆} }{2a}  \: and \: x =  \frac{ - b  -   \sqrt{ ∆} }{2a} \\ x =  \frac{11 +  \sqrt{201} }{2} \: and \: x =  \frac{11 -  \sqrt{201} }{2} \\ x =  \frac{11 + 14.18}{2} \: and \: x =  \frac{11 - 14.18}{2} \\ x =  \frac{25.18}{2} \: and \: x =  \frac{ - 3.18}{2} \\ x = 12.59 \: and \: x =  - 1.59

we're done here.

_________________________________

2) go...

I can just solve in one method.

First balance the equations to find when the ball and the rocket reach to the same height.

b(t) = p(t) \\   - {t}^{2} - 2t + 36 = - 2t + 20

subtract the sides of equation minus 20

-  {t}^{2} - 2t + 16 =  - 2t

subtract the sides of equation plus 2t

-  {t}^{2} + 16 = 0 \\  -  {t}^{2} =  - 16 \\  {t}^{2} = 16 \\ t = 4 \: acceptable \\ t =  - 4 \: unacceptable  \\ because \: time \: cannot \: be \: negative.

So after 4 seconds the rocket and the ball reach to the same height.

And we're compeletly done.

good luck buddy ♥️♥️♥️♥️♥️.

8 0
3 years ago
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