3 years ago

What is 8x-7(x+3)+5x

Mathematics

2 answers:

jek_recluse [69]3 years ago

5 0

Answer:

6x-21

Step-by-step explanation:

First distribute

8x-7(x+3)+5x

8x-7x-21+5x

Then combine like terms

8x-7x-21+5x

6x-21

OLga [1]3 years ago

4 0

Answer:

I'm not 100% sure love, but I think it would be 12x.

Step-by-step explanation:

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const2013 [10]

Answer:

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3 0

3 years ago

Which of the following is equivalent to the expression (9x^2y^3)(12x^-3y^5)(2xy)?

VladimirAG [237]

Answer:

$\large\boxed{(9x^2y^3)(12x^{-3}y^5)(2xy)=216y^9}\to\boxed{B.}$

Step-by-step explanation:

$(9x^2y^3)(12x^{-3}y^5)(2xy)=(9\cdot12\cdot2)(x^2x^{-3}x)(y^3y^5y)\\\\\text{Use}\ a^n\cdot a^m=a^{n+m}\\\\=216x^{2+(-3)+1}y^{3+5+1}=216x^0y^9\\\\\text{Use}\ a^0=1\ \text{for any value of}\ a\ \text{except 0}\\\\=216y^9$

6 0

4 years ago

Read 2 more answers

If 2cos∅ = √3, find the value of 2cos∅+1/2cos∅-1.

Musya8 [376]

$2\cos\Theta=\sqrt3\to\cos\Theta=\dfrac{\sqrt3}{2}\\\\2\cos\Theta+\dfrac{1}{2}\cos\Theta-1=\sqrt3+\dfrac{1}{2}\cdot\dfrac{\sqrt3}{2}-1=\dfrac{4\sqrt3}{4}+\dfrac{\sqrt3}{4}-\dfrac{4}{4}\\\\=\boxed{\dfrac{5\sqrt3-4}{4}}$