8(x-1) - 3x(4-x) + 6 (x+2) - 3. How can I simplify this?

1 answer:

3 0

Use the distributive property. For the first set of parenthesis, multiply everything inside by 8. This gets you to 8x-8.

Next set: Everything inside by 3x: 12x+3x^2.

Next set: Everything inside by 6: 6x+12.

Put it all together: 8x-8-12x+3x^2+6x+12-3.

Combine like terms: 2x+1+3x^2

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harina [27]

Answer:

1. y=7.2

2. x=18

Step-by-step explanation:

1. Triangles CMN and CBA are similar triangles (by AAA postulate). Similar triangles have proportional corresponding sides, so

$\dfrac{CM}{CB}=\dfrac{CN}{CA}\\ \\\dfrac{12}{12+y}=\dfrac{10}{10+6}\\ \\12\cdot 16=10\cdot (12+y)\\ \\192=120+10y\\ \\10y=72\\ \\y=7.2$

2. GK is angle G bisector. Use angle bisector's property:

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3 years ago