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vodka [1.7K]
4 years ago
5

Which trinomial is equivalent to 3(x-2)^2-2(x-1)?

Mathematics
1 answer:
attashe74 [19]4 years ago
8 0
If you would like to solve 3 * (x - 2) ^2 - 2 * (x - 1), you can calculate this using the following steps:

3 * (x - 2) ^2 - 2 * (x - 1<span>) = 3 * (x^2 - 2 * 2 * x + 2^2) - 2 * x + 2 * 1 = 3 * x^2 - 3 * 4 * x + 3 * 4 - 2 * x + 2 = 3 * x^2 - 12 * x + 12 - 2 * x + 2 = 3 * x^2 - 14 * x + 14
</span>
The correct result would be <span>3 * x^2 - 14 * x + 14.</span>
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Do more than 50 percent of the children in a certain group have brown hair?
babymother [125]

Answer:

What we know is that 30% of the group have brown hair and are girls. It means that in the other 70% we have the boys with brown hair, the other boys and the other girls.

In the case all the girls have brown hair, the 70% remaining would be boys. So 70% of then would have brown hair. (0.7*0.7=0.49 -> 49% of the children would be brown hair) so 49% (boys) and 30% (girls) are more than 50%..

Now, let's suppouse that 90% of the group are girls. It means 10% are boys and 70% of that 10% (=7%) are the boys in the group that have brown hair. Now 7% + 30% of the children have brown hair, wich isn't more than the half.

We have explained with two extreme cases that the information is not enough for making a precise answer

7 0
3 years ago
Joshua has $560. He wants to buy a laptop that costs $320 as well as a case for the laptop that costs $65 and is currently on sa
Igoryamba

Answer:$154.73

Step-by-step explanation:

Take 65 and multiple .15 and that will give you the 15% off of the case. When u do that you get 9.75 so then 65-9.75= 55.25 multiply .08 for the sales tax on the case = 4.42 add to 55.25= 59.67 then add the sales tax for the laptop 320 multiplied by .08 = 25. 60 for a total of 345.60 then add that to 59.67 = 405.27 then u have to subtract that from 560 and Josh has $154.73

6 0
3 years ago
I need help with this math question
djyliett [7]
Percent means per one hundred so we can say that:

p/100≈(28)/(28+81+45+63+35)  guessing with my old eyes :)

p/100≈28/252

p≈2800/252

p≈11.11%

So rounded to the nearest 5% you'd have:

p≈10%
5 0
4 years ago
The sum of two times x and one is at least 11. Write this word sentence as an inequality
Aneli [31]

Answer:

2x + 1 ≥ 11

Step-by-step explanation:

I believe this is it. Hope this helped!

7 0
4 years ago
Show me how to solve
Sedbober [7]
Draw the shape by drawing dots at the co-ordinates. 
Connect them in order, so if it's KLMN, connect K to L then to M then N.
Then, pick one of the points, I'd choose K, then move that dot 3 to the right, then move it 4 up. Do the same for all of the letters.
3 0
3 years ago
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