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Feliz [49]
3 years ago
13

5a(2x–a)–(8a–x)(2x–a)

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
4 0
Remember foil and distributive property
note the invible -1

5a(2x-1)-1(8a-x)(2x-a)
look at first bit
5a(2x-a)=10ax-5a^2
2nd part

-1(8a-x)(2x-a)
-1(16ax-2x^2-8a^2+ax)
-1(17ax-2x^2-8a^2)
-17ax+2x^2+8a^2

now combine the 2 parts
10ax-5a^2-17ax+2x^2+8a^2
2x^2+3a^2-7ax
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What is the percent equation for 46% of 127?
Brut [27]

Answer:

46% of 127 is 58.42

Step-by-step explanation:

46/100 = x/127

Cross multiply

46 × 127 = 100 × x

5,842 = 100x

Divide both sides by 100

58.42 = x

3 0
2 years ago
Nielsen ratings are based on televisions in 50005000 households. Nielsen estimates that 12 comma 00012,000 people live in these
avanturin [10]

Answer:

We are 95% confident that the true proportion of TV audience is between 65.15% and 65.85%

Step-by-step explanation:

-From the given information, \hat p=0.65.

-We calculate the confidence interval using this value at 95% confidence level:

CI=\hat p\pm z \sqrt{\frac{\hat p(1-\hat p)}{n}}\\\\\\=0.65\pm 1.96\times \sqrt{\frac{0.65\times 0.35}{12000}}\\\\\\=0.65\pm 0.0085\\\\\\=[0.6415,0.6585]

So, the 95% confidence interval is (0.6515,0.6585).

Hence, we are 95% confident that the true proportion of TV audience is between 65.15% and 65.85%.

6 0
3 years ago
It is 17 miles to the mall how many inches is that on a map
Alona [7]
In order to answer that question, we need to know the scale of the map.
Without that information, no answer is possible.

I think you have it in the first part of the question ... the part you decided
not to post.
_________________________

OK.  Now that you've provided the scale of the map,
answering the question is a piece-o-cake.
Use a proportion:

  (1 inch on the map) / (4 miles on the ground) = ('x' on the map) / (17 miles on the ground)
3 0
3 years ago
The sum of four consecutive numbers is 230. What is the largest of these numbers
vodka [1.7K]

Answer:

n + n+1 + n+2 + n+3 = 230

4n = 224

n = 56 and largest number = 59


Step-by-step explanation:


7 0
3 years ago
How do I simplify this?
Anastasy [175]
3/4 + 1 = 1.75 which is equivalent to 7/4
1- 3/4 = 0.25 which is equivalent to 1/4
the problem now looks like 7/4 / 1/4
you cancel out both 4
this problem simplified looks like 7/1
which is equivalent to 7 if you divide
6 0
1 year ago
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